"The global food system’s environmental impact is large and growing. Nearly a quarter of all planet-warming greenhouse gas emissions come from food production and associated land-use change. And as incomes rise and more people move to cities, consumption of meat and dairy – foods with outsized climate impacts – is on the rise.
The world population is expected to approach 10 billion people by 2050. With this projected increase in population and shifts to higher-meat diets, agriculture alone could account for the majority of the emissions budget for limiting global warming below 2°C (3.6°F). This level of agricultural emissions would render the goal of keeping warming below 1.5°C (2.7°F) impossible." Read more.