20-30% of plant and animal species will be more likely to become extinct if the temperature rises by more than 1.5-2.5C.
There will be big effects on farming from droughts and floods.
The biggest effects will be seen first near the Equator.
Just being near the Equator makes it more difficult for countries to make economic progress.
Hotter conditions affect how crops grow.
Our agriculture is heavily reliant on grasses from the temperate regions.
Corn, wheat, and rice are all types of grass.
The Tropics is a hard place to grow an industrial society.
The Tropics will expand as the world warms, so the world will find it harder to grow those important crops.
People will try to leave places where they cannot produce enough food.
Providing food for everyone in the world involves farming, fertilizer manufacture, food storage, packaging, transport and many other activities.
Those activities are responsible for up to one-third of all human-caused greenhouse-gas emissions.
Global warming affects wheat production.