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Plant-Based Foods And CO2 Emissions | Earth Wise

September 9, 2022 By EarthWise Leave a Comment

We often hear how eating locally-sourced food is a way to minimize the carbon footprint of our diet. But from a climate impact perspective, this only has a significant impact if transportation is responsible for a large portion of a food’s final carbon footprint. In many cases, the greenhouse gas emissions related to transportation make up only a small portion of the total emissions from food, and what we eat is far more important.

In general, beef and lamb have the biggest climate footprint per gram of protein. Plant-based foods tend to have the smallest impact. Pork and chicken are somewhere in the middle.

According to new research, U.S. food production could reduce its agricultural carbon footprint between 2.5% and 13.5% by embracing plant-based alternatives to beef. The study, from researchers at Cornell University, Johns Hopkins University, and international partners, found that most of the reduction would be achieved by decreasing the number of cows needed for beef production by two to twelve million animals. The research was recently published in the journal Lancet Planetary Health.

However, the researchers also found that acting to reduce climate change in this manner could have unintended consequences. For example, economic models from the research team show that the growth in popularity of plant-based beef could disrupt the agricultural workforce, threatening more than 1.5 million jobs.

But in the big picture, doing nothing will cost much more than doing something to slow climate change. Shifting diets away from meat and other animal products and towards more plant-based foods will help shrink carbon footprints and mitigate climate change. It’s a win-win for the planet and for human health.

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Plant-based ‘beef’ reduces CO2 but threatens ag jobs

Photo, posted November 27, 2018, courtesy of Sarah Stierch via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Food And Greenhouse Gas Emissions | Earth Wise

December 29, 2021 By EarthWise Leave a Comment

**According to a study published in the journal Nature Food, the world’s food systems are responsible for more than one third of global greenhouse gas emissions caused by human activities.**

‘Eat Local’ is often recommended as a way to minimize the carbon footprint of our diet. But from a climate impact perspective, eating local only has a significant impact if transportation is responsible for a large portion of a food’s final carbon footprint. And in many cases, greenhouse gas emissions related to transportation make up only a small portion of the emissions from food and what we eat is far more important.

There are massive differences in the greenhouse gas emissions of various foods.

For example, producing one pound of beef generates 60 pounds of greenhouse gas emissions. This is more than double the next closest food (lamb), and more than 60 times greater than some plant crops like corn and cassava.

For most foods – especially the largest emitters – greenhouse gas emissions from land use change combined with the emissions from processes at the farm stage account for more than 80% of the environmental footprint. Meanwhile, transportation accounts for less than 10%, and its contribution for the largest emitters is even smaller. For example, transportation accounts for 0.5% of emissions from beef production.

Eating beef or lamb has many times the carbon footprint of most other foods. It matters very little in terms of emissions whether it was grown locally or shipped from another part of the world. It’s not the location that makes the carbon footprint of our dinner large. It’s what is on our plate that matters.

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Food systems account for over one-third of global greenhouse gas emissions

You want to reduce the carbon footprint of your food?

Photo, posted November 7, 2018, courtesy of Preston Keres / USDA via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.

Food Production And Climate Change

January 29, 2019 By EarthWise Leave a Comment

According to a University of Oxford study recently published in the journal Science, food production is a major driver of climate change as it’s responsible for 26% of all greenhouse gas emissions. But the research team found that the environmental impact of different foods varied greatly.

Meat and other animal products are responsible for 58% of all food-related greenhouse gas emissions, despite only providing approximately one-fifth of the calories we consume. The researchers found that beef and lamb in particular have the most damaging effect on the planet, responsible for half of all greenhouse gas emissions from animal agriculture.

These findings echo recommendations from the Intergovernmental Panel on Climate Change about how individuals can reduce their carbon footprint through diet. The IPCC suggests we consume less meat and dairy products, consume more locally-sourced seasonal foods, and throw less food in the trash.

Avoiding meat and dairy products can reduce an individual’s carbon footprint from food by two-thirds. The effects of doing so include everything from conserving water and preserving biodiversity to reducing pollution and deforestation.

Interestingly, the same food can have major differences in terms of environmental impacts. For example, beef raised on deforested land is responsible for 12 times as many greenhouse gas emissions as that raised on natural pastures. But even the most climate-friendly meat options are still responsible for more greenhouse gas emissions than the highest-impact vegetable proteins, like beans and nuts.

Big differences can also be made by avoiding chocolate and coffee produced from deforested lands.

To learn more about the climate impact of your diet, follow the link to the ‘Climate Change Food Calculator’ on our website: Earth-Wise-Radio.org.

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Reducing food’s environmental impacts through producers and consumers

Climate change food calculator

Photo, posted June 21, 2011, courtesy of USDA NRCS Montana via Flickr.

Earth Wise is a production of WAMC Northeast Public Radio.