Here’s a sobering fact: Even if the entire world transitions away from fossil fuels, the way we farm and eat will cause global temperatures to rise 1.5 degrees Celsius above preindustrial levels — the critical threshold set in the Paris Climate Agreement. The further we go above that limit, the more intense the effects of climate change will get. The good news is that we know the most effective way to avert catastrophe: People in wealthier countries have to eat more plant-based foods and less red meat, poultry, and dairy. Such a shift in diets — combined with reducing global food wa...

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