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 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.
Global warming affects wheat production.
People who are struggling to cope with their food supply will move to cities, or aim to move to other countries, where they may not be welcome.
Farming developed in the stable climate of the Holocene.
Humans were around from over 200,000 years ago, and it is likely farming was not viable until the climate settled down.