How much of global greenhouse gas emissions come from food? 

Hannah Ritchie, 2021.

There are a wide range of estimates for how much of the world’s total greenhouse gas emissions come from food. Some studies say this figure is one-quarter, some say it’s more than one-third.

Where do these differences come from? There are three reasons why some of these estimates vary so much:

1) some studies do not include emissions from cooking and food waste;

2) different studies disagree about the emissions from land use change and deforestation; 

3) some, but not all, studies include non-food agricultural products such as cotton, wool, leather and biofuels

The specific number that answers this question depends on these three factors, but the range of possible answers is not too large: around 25% to 30% of global emissions come from our food systems, and this rises to around one-third when we include all agricultural products.

 

https://ourworldindata.org/greenhouse-gas-emissions-food

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