ASAPScience's looks at what would happen if everyone in the world would go vegetarian. Interestingly, while this would free up an area of land the size of Africa, not all that land would be suitable to be used for agriculture; however, the video argues that some of that land could be used to restore grasslands and forests, potentially offsetting climate change.
Surprisingly, switching to an all vegetarian diet, could cause long term gene changes.
The team from Cornell University found another variation too: the Inuit populations of Greenland, whose diet is mainly based around seafood, didn't have the same DNA building blocks as similar communities that were largely vegetarian. While the vegetarian allele was found to have an insertion of 22 bases (DNA building blocks) within the gene, this insertion was deleted in the seafood allele, suggesting that over several generations, our bodies could be adapting to the types of food we're eating.
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