In a new study, scientists have calculated the greenhouse gas emissions of animal and plant-based foods. The study came to a surprising conclusion: the second largest emitter is a plant product.
All aspects of global food production together produce more than 17 billion tons of greenhouse gases every year. Of this, 57 percent goes to animal-based foods, 29 percent to plant-based ones. This is shown by a study that has just been published by Nature Food.
Beef is the main cause of greenhouse gases
Of all the foods examined, beef production was by far the largest contributor to greenhouse gases – with a share of 25 percent. Rice follows in second place with twelve percent. Rice is such a high source of emissions because when the rice fields are flooded, bacteria that produce methane are created.
Considering only the animal products, after the beef follow in this order:
cow milk
pork meat
chicken meat
For plant products, after rice, follow:
Wheat
sugar cane
Corn
South and Southeast Asia: Region with the highest emissions from food
According to the study, the regions with the most emissions related to food production are South and Southeast Asia. In addition, this region is the only one whose emissions are so high due to plant-based foods and not animal ones. Greenhouse gas emissions were highest in China, India and Indonesia. The reason for this is primarily the cultivation of rice.
With the study, the authors want to contribute to reducing greenhouse gas emissions through changed management. Conceivable measures are the reduction of fertilizer use and the use of tillage methods.
In addition, the scientists want to investigate how the food needs of a growing world population can be met while at the same time stopping deforestation.
According to the research team, part of which is based at the University of Illinois, this study is more detailed and comprehensive than comparable studies. Because the authors used data from 171 plants and 16 animal products from more than 200 countries.
In addition, they used computer models to calculate the amounts of carbon dioxide, methane and nitrous oxide produced from different aspects of nutrition, including consumption and production.
One study author points out that it is important to find out which reduction targets make the most economic and ecological sense. “You want to do everything,” she says, “but you can’t do everything at the same time.”
Utopia says: This study shows once again that we have to reduce greenhouse gases and that a change in diet makes sense for this. Although rice is mentioned here as the second largest emitter of greenhouse gases, a balanced plant-based diet can reduce a lot of CO2 emissions and other greenhouse gases.