Adopting a diet in line with the global guidelines could avert 5.1 million deaths per year by 2050, while 8.1 million fewer people would die in a world of vegans who do not consume animal products, including eggs and milk.

When it comes to climate change, following dietary recommendations would cut food-related emissions by 29 percent, adopting vegetarian diets would cut them by 63 percent and vegan diets by 70 percent.

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