Producing food can put a lot of climate-warming pollutants into the atmosphere. But some foods, especially meats, contribute more than others.
CO2 values are now 50 percent higher than before the Industrial Revolution.
Arctic warming is affecting weather farther south, where most of the world lives. The impacts are especially worrisome for agriculture.
Many companies have moved the plants that make their products to developing countries, such as China. But the pollution linked to making those products can travel around the world.