Environment & Climate Change – Page 6

Many Popular Environmental Actions Are Ineffective

Super fact 33: Actions such as eating locally, buying organic produce, using paper straws, and recycling can be good for the environment but can also be worse for the environment and these actions often have a much smaller positive impact than alternative rarely considered actions. What are popular actions for the environment is often different from what is effective.

I consider this a super fact because the beliefs regarding what is good for the environment and what is bad for the environment and what has a significant impact and what has not, are often based on popular trends and culture rather than knowledge. We need to educate ourselves. Following trends is not the answer to good stewardship of the planet.

A big green hand is depicted to symbolize the protection of the environment, where climate-friendly topics are also depicted, such as wind turbines and recycling symbols | Many Popular Environmental Actions Are Ineffective — This content was generated by an Artificial Intelligence (AI) system. Asset id: 2531547331

Is Locally Grown Food Really Better for the Environment?

As I explained in this post eating locally is not necessarily ecological. Agricultural products that are grown off season or in non-native environments are often grown in greenhouses, which require a lot of energy and generate significantly more emissions than shipping the produce across oceans would. This is especially true for crops like tomatoes, cucumbers, mangoes and bananas, that require warmer climates to be grown in open fields.

Red cherry tomatoes | Many Popular Environmental Actions Are Ineffective — From pexels.com by Julia Nagy.

In some cases, the crop requires significant water resources or chemical inputs to thrive and may not be suitable for warmer climates, for example, apples. Some crops, like avocados or almonds require a lot of water but despite that they are grown in dry places like California (80% of California’s freshwater is used for agriculture). From an environmental perspective it would be better to grow these crops in a suitable environment and then transport them.

Is Eating Organic Really Good for the Environment?

As explained in this post eating organic is not necessarily ecological. Despite strong public perception of organic agriculture producing better environmental outcomes, conventional agriculture often performs better on environmental measures including land use, greenhouse gas emissions, and pollution of water bodies. There are, however, some contexts where organic agriculture may be better for the environment.

The graph below gives an overview of the environmental impact of various types of crops grown organically and conventionally. As you can see organic crop often require double as much land compared to conventionally grown crops. It is complicated.

The graph shows the six food groups and their impact across greenhouse gas emissions, land use, eutrophication potential, acidification potential and energy usage | Many Popular Environmental Actions Are Ineffective — Shown is the relative environmental impact of organic and conventional agriculture across various ecological and resource indicators based on a meta-analysis of 164 published life-cycle analyses (LCAs) across 742 agricultural systems. Roughly, lower in the graph means organic is better and higher up in the graph means conventional farming is better. Data source: Clark & Tilman (2017) – Comparative analysis of environmental impacts of agricultural production systems, agricultural input efficiency, and food choice. In Environmental Research Letters. The data visualization is available at OurWorldinData.org<<Link-10>>. There you can find research and more visualizations on this topic. Licensed under CC BY-SA by the authors Hannah Ritchie and Max Roser.

What really matters though is the type of food you eat, not whether it is organic or not. For example, beef (from beef herd) causes emissions 188 times larger than nuts do for the same amount of protein provided. Another thing to note is that if you eat 300 steaks per year you will have a 100 times larger environmental impact from your meat eating compared to someone who eats 3 steaks per year. You don’t have to become a vegetarian to have a smaller environmental impact but quantity matters.

Is Recycling Important?

The common perception that recycling is one of the best things you can do for the environment is not correct. Its impact is often not very large and if not done properly it can be counterproductive. If you throw a greasy pizza box in the recycling, you can ruin the entire batch.

Surveys across 21,000 adults in 30 countries showed that the two actions among twelve that people believed saved the most greenhouse gases were recycling (59%) and upgrading lightbulbs (36%). As it turns out, those two saved the least greenhouse gases among the twelve options. The option saving the most greenhouse gases among the 12 was giving up an SUV, which saved 18 times as much greenhouse gases as recycling. 17% of respondents picked that one.

A filled recycling bag — Photo by Anna Shvets on Pexels.com

According to Our World in Data (and the book Not the End of the World page 114<<Link-6>>), which is based on this research, giving up an average SUV for a sedan would save 3.6 metric ton, or 22.5% of the carbon emissions for the average American. Switching to a plant-based diet would save 2.2 metric ton per person, or 13.8%. Recycling comes in at a savings of 0.2 metric tons according to the same data. EPAs estimates are slightly higher but still low in comparison.

Plastic straws versus paper straws

Producing a plastic straw requires 39 kilojoules of energy and produces 1.5 grams of carbon dioxide emissions. However, producing a paper straw requires 96 kilojoules of energy and produces 4.1 grams of carbon dioxide emissions. So, plastic straws are better for the environment from that perspective. However, this could be compared to a typical passenger vehicle, which emits about 4.6 metric tons of CO2 per year according to EPA. That corresponds to more than 3 million plastic straws and more than one million paper straws.

According to the same article the average passenger vehicle emits about 400 grams of CO2 per mile. So, driving just one mile corresponds to hundreds of plastic straws and paper straws.

Plastic straws — Photo by Christopher on Pexels.com

One advantage of paper straws is that they are easier to recycle, at least under ideal circumstances. Unfortunately, they often get soggy, and recycling plants don’t want that so they often throw them out. Another advantage is that paper straws decompose and don’t end up in our ocean.

However, not only are straws very small items, most of the plastic pollution in the ocean does not come from north America(1%) or Europe (1%). Paper straws versus plastic straws seem like a complex riddle but it may not be an important one. Whether you drive more or drive less is probably a lot more important.

Plastic bags versus paper bags

As with plastic straws versus paper straws plastic bags versus paper bags is a complicated question. From an environmental perspective they both have advantages and disadvantages. Plastic bags are less carbon intensive to produce, are easier to reuse several times, and the production of plastic bags require on average four times less energy than the production of paper bags.

On the other hand, paper bags are decomposable and easier to recycle. However, the chemicals and fertilizers used in producing paper bags create additional harm to the environment. It is a complicated question.

Whale Shark swimming in the ocean about to swallow a plastic bag. — Plastic Ocean pollution. Whale Shark filter feeds in polluted ocean, ingesting plastic. Asset id: 1120768061 by Rich Carey

Having a Significant and Positive Impact on the Environment

Some of the allegedly sustainable practices and actions mentioned above are counter productive and others have a very small effect, for example, carbon emissions savings that are a few grams. According to the “Our World Data” and the book “Not the End of the World” page 114, a compilation of data research, some actions that you can take that will significantly reduce carbon emissions are (savings in metric tons per year, for flight it is per trip):

Giving up an SUV 3.6 tons
Go car free (average car) 2.4 tons
Switch to plant-based diet 2.2 tons
Avoid transatlantic flights 1.6 tons
Buy green energy 1.5 tons
Switch to electric car (from average sedan) 1.2 tons
Switch from electric car to none 1.2 tons
Avoid medium flight 0.6 tons (1,700 miles each way going and returning)
Laundry in cold water 0.25 tons
Hand-dry clothing 0.2 tons
Recycle 0.2 tons
Upgrade light bulbs 0.1 tons

As you can see in the graphs below, the largest contributor of greenhouse gas emissions in the World and in the United States is electricity and heat. Unfortunately, the composition of the electric grid is something we as consumers have very little control over. We can save energy, get solar panels for our roof, or buy our electricity from green energy companies, but we cannot easily change the composition of the grid. Energy companies and politicians must do that.

However, we can make our voices heard by calling and writing to our representatives. This might be the single most impactful action that you as an individual can take. Your congressman, senator, or state legislator will probably not read your letter. They have hundreds of thousands or millions of constituents and get lots of letters every day. What is likely to happen is that a staff member will skim the letter and note the concern in a database.

Just make sure that your letter is politely written so it does not go in the wastebasket. Also make sure that you are a constituent. Writing to Ted Cruz when you live in Florida is not going to have an impact. They are interested in finding out what the concerns of their constituents are and according to staff members and other information I have come across, this really has an impact.

The largest contributor of greenhouse gas emissions in the World is electricity and then comes Transport. After that comes manufacturing and construction, agriculture, industry, fugitive emissions, buildings, waste, land-use change and forestry, aviation and shipping, other fuel combustion | Many Popular Environmental Actions Are Ineffective — Data source : Climate Watch (2024). Note : Land use emissions can be negative. OurWorldinData.org/co2-and-greenhouse-gas-emissions| CC BY

The largest contributor of greenhouse gas emissions in the US is electricity and heat but it has gone down. Transport is number two. Then comes buildings, manufacturing and construction, fugitive emissions, agriculture, industry, waste, aviation and shipping, other fuel combustion, land-use change and forestry | Many Popular Environmental Actions Are Ineffective — Data source : Climate Watch (2024). Note : Land use emissions can be negative. OurWorldinData.org/co2-and-greenhouse-gas-emissions| CC BY

Conclusion

The survey mentioned above showed that among the twelve environmental actions an individual could take, the one with the second to smallest positive impact was the one that the majority thought had the biggest positive impact, despite it having a relatively tiny impact. The actions that could really make a huge difference were hardly considered.

We, the public, are very bad at determining what is good or bad for the environment and what has a significant and positive impact or not, even though the data is out there and we easily can look it up. Maybe the biggest positive impact one could have on the environment is to look up the facts and get better educated.

To see the other Super Facts click here

Climate Science versus Pseudo Science

The goal of this blog is to create a list of what I call super facts. Important facts that we know to be true and yet they are surprising, shocking or disputed among non-experts. It is a type of myth busting. However, I also create posts that are not super facts but other interesting information, such as this book review and book recommendation.

Climatology versus Pseudoscience: Exposing the Failed Predictions of Global Warming Skeptics by Dana Nuccitelli

Climatology versus Pseudoscience by Dana Nuccitelli is a book about human-caused Climate Change, or global warming, and how we know that is happening and how we know that we are the cause of it. If you want to see more about why we know this click here.

The book pays a lot of attention to so called climate skeptics; more accurately called climate contrarians. They are not true skeptics but agenda driven contrarians. Even though their science is bad, and their predictions have failed repeatedly many times over, they have had an enormous influence on public discourse. Conservative politicians, and many talk show hosts are blindly devoted to their falsehoods, whilst real scientists are being attacked. Large segments of the population in the United States, and to some extents elsewhere, have been bamboozled by the pseudo-science.

The good news is that people are waking up to the reality that they have been bamboozled. We know that global warming, or if you call it climate change, is not only real, but we also know that the current rapid warming is caused by us, primarily via our carbon emissions. I was bamboozled by the pseudo scientists myself, but then I took a serious look at the science, and I realized that that I had been bamboozled. This book will walk you through the faulty arguments of the climate contrarians, and it does so in a logical and convincing manner. It features hundreds of references. I bought the hardback version of this book.

Hardcover – Publisher – Praeger; Illustrated edition (March 3, 2015), ISBN-10 : 1440832013, ISBN-13 : 978-1440832017, 232 pages, item weight : 1.3 pounds, dimensions : ‎ 6.14 x 0.56 x 9.21 inches, it costs $11.96 – $53.00 on US Amazon. A new copy is $53.00. Click here to order it from Amazon.com.
Kindle – Publisher – Praeger; Illustrated edition (March 3, 2015), ASIN : B0C71FFTQT, 230 pages, it costs $50.35on US Amazon. Click here to order it from Amazon.com.

The front cover features the full title “Climatology versus Pseudoscience: Exposing the Failed Predictions of Global Warming Skeptics” and the author’s name, as well as a picture of a snow-covered car with the inscription it was 82 degrees yesterday | Climate Science versus Pseudo Science By Dana Nuccitelli — Front cover of Climatology versus Pseudoscience. Click on the image to go to the Amazon page for the hardcover version of the book.

Amazon’s Description of Climatology versus Pseudoscience

This book explains the science of climate change in plain language and shows that the 2 to 4 percent of climate scientists who are skeptical that humans are the main cause of global warming are a fringe minority—and have a well-established history of being wrong.

Although some politicians, pundits, and members of the public do not believe it, global warming predictions by mainstream climate scientists have been remarkably accurate while those made by climate deniers have not. And if mainstream global warming predictions continue to prove correct, the window of opportunity to prevent a climate catastrophe is quickly closing. This book is the first to illustrate the accuracy—and inaccuracy—of global warming predictions made by mainstream climate scientists and by climate contrarians from the 1970s to the present day. Written in simple, non-technical language that provides an accessible explanation of key climate science concepts, the book will appeal to general audiences without previous knowledge about climate science.

This is my five-star review for Climatology versus Pseudoscience

A Journey into Climate Science and a Debunking of Climate Contrarianism

The author starts out by giving us an overview of climate science starting with the discovery of the greenhouse effect by Jean Baptiste Joseph Fourier in 1820’s. He explains that the planet would be much colder than it is if it wasn’t for the greenhouse effect. The greenhouse effect acts like a blanket. He also explains why we know that the global warming that we have seen in recent decades is a greenhouse effect chiefly caused by our burning of fossil fuels, and not natural causes.

The warming is leaving behind various fingerprints, such as the upper atmosphere cooling while the lower atmosphere is warming (like a blanket would), which wouldn’t happen if it was the sun or an orbital cycle causing the warming. The conclusion is that we know that global warming is real, and we know that we are the ones causing it.

Note : I will use the term “global warming” in this review. Whether you call the phenomenon climate change, climate disruption, or global heating, is not important.

The author also discusses climate models, and he notes the astounding accuracy of the early climate models. He takes us on a journey through the development of modern climate science into the 1950’s, and the rapid growth of climate science in the 1960’s and 1970’s and then into the 1980’s, 1990’s and the 2000’s. He describes the increasingly advanced and increasingly accurate climate models. In addition, he discusses sulfate aerosols and global warmings forgotten evil twin ocean acidification.

This is all very interesting to any science nerd and it makes you understand why we know that we are causing the global warming we are seeing. It also makes it obvious why there is a consensus on the topic. Several studies have shown that at least 97% of climate scientists believe that global warming is real and that we are the cause of it.

However, despite the scientific rigor of peer reviewed mainstream climate science, despite the impressive success of climate models, and despite the scientific consensus, the public is very confused about the topic. Enter a small group of so-called global warming skeptics, or more accurately, global warming contrarians. They are not true skeptics but agenda driven contrarians. Even though their science is bad (pseudoscience) and the fact that their predictions have failed repeatedly many times over, they have an outsized presence in the media and often a large enthusiastic following.

It is not just rightwing media who are using them for their purposes, but mainstream media are giving the contrarians undue attention as well. Sensationalism is one issue. A science contrarian claiming that all the climate scientists are wrong, and he is the only one who finally got it right is a lot more interesting of a story than a repeat of the consensus. Another issue is false balance. As a journalist you should not feel that you must give equal time to evidence based science and nonsense.

The author also discusses various myths and false claims spread by climate science contrarians. He mentions that unfortunately most Republican congressmen stand with the contrarian pseudoscientists rather than with the science. Well, with the exception for a few brave souls. On average the American public believe that 55% of scientists agree that we are the cause behind the global warming while the consensus is more than 97% and growing stronger. The author refers to this as the consensus gap.

It is easy to be confused. I have a degree in physics and a PhD in electrical engineering / robotics and yet I was bamboozled by the climate science contrarians. I read books by the contrarians including some of the ones the author discusses, and I believed them. I also followed pretty much only rightwing media at the time and as a result I became misinformed. It was not until I took a deep dive into the subject and read what the actual science said that I realized that I had been bamboozled. Some of the science articles that initiated my change of heart were written by the author. That was back in 2012 and 2013.

This book is a great start if you want to take a serious look at climate science. The book is well organized, and the author is an expert on the subject, as well as a great communicator. Even though many of the things he discussed in the book were not new to me, I very much enjoyed reading the book and I learned some new things. If you don’t know much about climate science but are interested in science, then this book is a must read.

The back cover of Climate Science versus Pseudo Science by Dana Nuccitelli — Back cover of Climatology versus Pseudoscience. Click on the image to go to the Amazon page for the Kindle version of the book.

About the Author of Climatology versus Pseudoscience

Dana Nuccitelli is an environmental scientist and climate blogger for The Guardian and SkepticalScience.com. He’s been researching and writing about climate science since 2006. He has a bachelor’s degree from UC Berkeley in astrophysics, and a master’s degree from UC Davis in physics.

To see the Super Facts click here

Environmental Benefits of Recycling Are Overestimated

Super fact 32: The common perception that recycling is one of the best things you can do for the environment is an exaggeration. Its impact is often not very large and if not done properly it can be counterproductive.

In general recycling is beneficial, because you conserve natural resources, reduce climate change, save energy and reduce waste and pollution. Battery recycling is particularly important since it reduces toxic waste and reduces the risk of a future shortage of certain minerals. Recycling is often viewed as a very important activity that everyone should participate in, and neighbors often shame those who fail to comply.

The shocking news is that even though recycling in general is good for the environment it may not be as beneficial as it is assumed. It turns out to be complicated. As you will see later, most people think that recycling is the most impactful action you can take as an individual to reduce carbon emissions, when in fact it is of very marginal importance. This is what made me consider this a super fact.

A company where a big green hand is depicted to symbolize the protection of the environment, where climate-friendly topics are also depicted, such as wind turbines or recycling | Environmental Benefits of Recycling Are Overestimated — This content was generated by an Artificial Intelligence (AI) system. Asset id: 2531547331

Recycling and Greenhouse Gases

According to EPA recycling saves 193 million metric tons of carbon emissions, which sounds a lot until you consider that the US emit 6,343 million metric tons per year according to EPA making it 3%. According to this website consumers can save 732 kilograms of CO2 assuming they do the recycling correctly. This should be compared to the average carbon footprint for an American (US), which is 16 metric tons, making the savings for good recyclers 4.6%.

According to our World in Data (Not the End of the World page 114), based on this research, giving up an average SUV for a sedan would save 3.6 metric ton, or 22.5%. Switching to a plant-based diet would save 2.2 metric ton per person, or 13.8%. Actions saving more greenhouse gases than recycling that we as consumers can take, are for example: give up SUV, go car free, have a plant-based diet, avoid transatlantic flights, buy green energy, switch to electric car, switch from electric car to no car, avoid medium flights, laundry in cold water, and hand dry clothing.

Surveys across 21,000 adults in 30 countries showed that the two actions that people believed saved the most greenhouse gases were recycling (59%) and upgrading lightbulbs (36%). Upgrading lightbulbs have an even smaller effect than recycling. It is of course still a good action to take.

However, what this data demonstrates is that we are bad at guessing which actions are impactful. We need to get better informed and not make assumptions. It should be noted that the efficiency of the recycling efforts varies from country to country. Among the 32 developed countries for which there is data the United States ranks 25.

Recycling and Plastic Waste

Greenhouse gas emissions is certainly not the only issue to consider. What about plastic waste? As it turns out plastic is very difficult to recycle (depending on the kind of plastic) and according to the EPA less than 9% of plastic is recycled. According to Our World in Data and the book “Not the End of the World” by Hannah Ritchie the US and Europe have well managed landfills and good waste management systems that make our plastic problem less of an issue. That’s good news.

But what about the awful problem with plastic in the ocean? Plastic ending up in the ocean is indeed a bad problem. However, 81% of all plastic in the ocean come from Asia, and the rest mostly comes from Latin America. Only 1% come from the United States and 1% from Europe and Oceania. According to Scientific American 93% of plastic in ocean come from just 10 rivers. Eight of them are in Asia: the Yangtze; Indus; Yellow; Hai He; Ganges; Pearl; Amur; Mekong. Two are in Africa – the Nile and the Niger.

None of them are in North America or Europe. Therefore, if we in the developed world greatly improve our recycling of plastic, it would not make much of a difference with respect to the problem of plastic in the ocean. What we need to do is assist China, India and southeast Asia with improving their waste management systems.

Another issue to keep in mind is that uneducated consumers can do a lot of damage to the recycling process. For example, throwing a greasy pizza box into the recycling bin can ruin the entire batch. You are not just recycling incorrectly you are ruining the recycling efforts of your neighbors too. There are many ways to ruin the recycling process, by throwing items in the recycling that don’t belong there. Recycling requires consumers to pay attention to the instructions. It should also be noted that some companies have been found to ignore the recycling process and throw all recycled items in with the trash. There are also neighborhoods that don’t have recycling.

Conclusion

In summary, recycling may not be as great as it is often made out to be. You should still do it if you care about the environment. Just be aware that there are actions that you can take and that your government can take that are much more impactful.

One of the conclusions you can draw from this discussion is that if you are driving a big SUV or eating red meat every day you should probably abstain from shaming your neighbor for not recycling.

To see the other Super Facts click here

Eating Locally is not Necessarily Ecological

Super fact 30: Eating locally is often promoted as an environmentally friendly choice, but that is not always the case.

Whether the food you eat is sustainable and environmentally friendly or not depends on a lot of factors including agricultural methods, whether greenhouse farming or monocropping was used, and whether the crop is natural to its environment. In addition, inefficient local transportation can result in higher emissions than faraway transport by ships and trains. If a crop is grown locally in greenhouses, the extra energy that is needed, and the resulting extra carbon emissions are often much larger than the emissions from the transport.

Cargo ship at sunset. Emissions from the transport of produce is not the main factor for emissions. — Photo by aries nha on Pexels.com

I consider this a super fact because it is often assumed that buying locally is the best choice for the environment. After all, transporting something across the world causes a lot of emissions, right? It turns out not to be that simple.

Articles on Transportation of Food in my French Book

The first time this issue was brought to my attention was in my French class. I am learning French, just as a hobby. There was an article in our French book on the transportation of food around the world “Notre planète ne tourne pas rond!”.

We read that cashews were grown in the Ivory Coast in Africa and then sent for peeling and cleaning in Brazil and then sent to France to be sold. The cashews travelled 10,000 kilometers or 6.250 miles. We read about cod that was caught in Norway then sent to China to be cut into filets and then sent to France to be sold. That cod travelled 15,000 kilometers. We all thought it was crazy, and very bad for the environment, so much unnecessary emissions from transportation. But we all learned a few new French words.

Then at our next class, we turned the page “Consommer local, vraiment bon pour la planète?” / “Consuming locally, really good for the planet?”. Wait what? The next article confused us since it stated that in many cases eating locally was bad for the environment, not good for the environment. Transporting the food around the globe might be good for the environment.

Incidentally, at the time I was reading “Not the End of the World, How we can be the first generation to build a sustainable planet” by Hannah Richie, the research director for “Our World in Data”. “Our World in Data” is a highly regarded free and open-source website that collects and analysis vetted statistics on a large range of topics. In that book she stated that the data showed that tomatoes imported to Sweden from Spain caused less carbon emission than tomatoes grown locally in Sweden.

The Problem with Locally Grown Tomatoes

This article from University of Southern Denmark claim that importing tomatoes from warm countries are better for the environment than buying locally. The reason being that when tomatoes are grown in an open field, the production emits an average of 80 kg CO2 per ton, but if the tomatoes are grown in a greenhouse, they emit up to 700 kg CO2 per ton. In northern countries it is common to grow tomatoes in greenhouses, especially when they are out of season. The long transport of the tomatoes causes much less emissions than that.

This scientific article analyses the issue a bit deeper and concludes that “that the distance travelled by the tomatoes is not the most important environmental burden”. Whether the tomatoes were grown in greenhouses or not matters a lot, but there are many other factors. In short, it is complicated.

Lots of fresh red tomatoes | Eating Locally is not Necessarily Ecological — Photo by Julia Nagy on Pexels.com

This study of local vs. imported tomato production in Canada concludes that locally grown tomatoes grown in greenhouses on average cause 1,070 grams of carbon emissions per kilo of tomatoes grown and tomatoes grown open field in Mexico cause 775 grams of carbon emissions per kilo of tomatoes, despite the 3,800-kilometer journey from Mexico to Ontario, Canada. The reason for the higher emissions for locally grown tomatoes is again that greenhouses use a lot of energy.

Naturally, this would change if you grew the tomatoes in season without using greenhouses. The article also notes that carbon emissions are not the only issue for sustainability. Water usage is another important factor.

The Problem with Locally Grown Vegetables and Fruits

Tomatoes are just one example. The same hold true for cucumbers, lettuce and salad greens, potatoes, bell peppers, hot peppers, green beans and other bean varieties, berries, pineapples, bananas, mangoes, other tropical fruits. In addition, some of these crops can deplete the soil and require large amounts of water, which can be bad if they are being cultivated in areas where water resources are already scarce such as growing avocados in California. In general, growing vegetables and fruits in their natural environment tends to be the most sustainable.

Fresh yellow bananas | Eating Locally is not Necessarily Ecological — Photo by Dom J on Pexels.com

The Problem with Locally Grown Apples

The problem with apples tends to be the opposite, geography wise. In warmer areas, they might require significant water resources or chemical inputs to thrive. Apples from cooler climates need less water and fewer chemicals, reducing their ecological impact.

Lots of apples | Eating Locally is not Necessarily Ecological — Photo by Pierpaolo Riondato on Pexels.com

Local versus Imported It’s Complicated

I should point out that growing locally sometimes being worse for the environment than importing does not mean that importing produce is better for the environment. It just means that it is complicated and that you need to make that determination on a case-by-case basis. The environment is also not the only concern. Another consideration is the protection of local farmers and the local economy.

My opinion is, instead of worrying a lot about local versus imported produce, it is better to focus on things that we know cause a lot of emissions. A dirty grid, coal power stations, a non-hybrid SUV with an internal combustion engine, unnecessary business trips, eating a lot of red meat, basically start with the low hanging fruit.

Eating Locally is not Necessarily Ecological — Photo by Janusz Walczak on Pexels.com

To see the other Super Facts click here

EV Cars Indeed Emit Less Carbon Pollution

Super fact 29: EV Cars emit less pollution than Internal Combustion Engine Cars, even considering manufacturing, disposal and EV Cars being charged by dirty grids.

EV Cars emitting less carbon pollution is a Super Fact

At least here in Texas it is quite common to hear people say that EV cars do not reduce emissions. After all EV cars use electricity from the dirty grid. It is also frequently implied that environmentalists and people who care about fossil fuel emissions do not understand that the electricity for EV cars typically comes from the dirty grid. However, the environmentalists I know do know that. In fact, they typically know more and have sometimes done the math. This is why I consider it a super fact. We know that it is true that EV Cars emit less carbon pollution. This is a fact that matters, it is not trivia, and yet this fact is frequently disputed, argued over, or surprising to people.

EV Cars are more efficient than Internal Combustion Engines

For starters, EV cars are much more efficient than Internal Combustion Engine cars, or ICE, and even a coal-fired power plant is less wasteful than a car engine. The net result is that the emissions caused by EVs via the electrical grid are significantly less per mile. The miles per gallon equivalent (MPGe) for electric vehicles (EVs) varies by state/grid and depends on the model of the car but in general it is much better than for an ICE . Replacing gasoline-powered cars with EVs saves energy, regardless of the energy source used to recharge the EVs. For an ICE 16-25% of the original energy goes to the wheels whereas for an EV 87-91% of the original energy goes to the wheels.

Image showing an ICE car and its various carbon losses | EV Cars Indeed Emit Less Carbon Pollution — 16-25% of original energy goes to the wheels. Data from FuelEconomy.gov, Image by Karin Kirk for Yale Connections.

Image showing an EV car and its various carbon losses | EV Cars Indeed Emit Less Carbon Pollution — 87-91% of original energy goes to the wheels. Data from FuelEconomy.gov, Image by Karin Kirk for Yale Connections.

The Manufacture and Disposal of EV Cars

It takes more energy to manufacture an EV battery for an EV car than it does to produce a combustion engine. So, the production of an electric vehicle does emit more carbon than a petrol car. However, the lower emissions resulting from driving an EV means that an electric car quickly pays back that debt, so to speak. It is typically paid back within two years, according to Hannah Richie, the research director at Our World in Data. The statistics show that switching from an average ICE to an equally sized EV will save 1.2 tons of carbon emissions per person and year. That is a lot considering that the average carbon footprint per year is 4 tons worldwide and 14.4 tons per year for an American.

So, are electric vehicles definitely better for the climate than gas-powered cars? This article from MIT answers the question in the affirmative. The graph below includes construction of facilities, manufacturing of vehicle and battery, production of fuel, vehicle operation as well as disposal. It is taken from this government website and this article also answers the question above in the affirmative. This is an article from the Department of Energy is stating the same thing.

The histogram graph show that if you consider construction of facilities, manufacturing of vehicle and battery, production of fuel, vehicle operation as well as disposal the total average greenhouse gas emissions from EV cars is 52% less. — Lifecycle greenhouse gas emissions comparison of average gasoline car and average EV.

Hannah Richie at Our World in Data also states that other environmental damages related to EVs such as mining for minerals are less than the damage from mining and extraction for fossil fuel cars, and she claims that the price of lithium-ion batteries has fallen by 98% over the last three decades. It should be noted that EVs are becoming increasingly common. According to Our World in Data in 2022, 88% of all cars sold in Norway were EVs and 54% of all cars in Sweden were EVs.

EV Cars Indeed Emit Less Carbon Pollution — Photo by Kindel Media on Pexels.com

Other EV Myths

There are other EV myths that you may want to have debunked, such as Electric vehicle batteries are unreliable and need to be replaced every few years. In 2011 battery failures were common, 7.5%, but in 2023 battery failures were 0.1%. See this article for details and other myth debunking. A related post is my post on electrification.

I should add that there are some drawbacks with EVs such as the easy with which you can charge them, depending on your location. This post is not a promotion of EVs, and I do not drive an EV for various reasons. This post, like most posts in this blog, is about correcting misinformation and getting the facts correct.