Farming depends on the weather. Changes in rainfall and temperature can have a major effect on how well or how badly crops grow.
How will climate change affect the agriculture?
Higher temperatures may mean crops grown now in the south can be grown further north, but they may also mean some crops can't be grown at all, because it's too hot for them to survive.
Crops may need more artificial watering if there is less rainfall and more evaporation. So widespread irrigation systems may need to be introduced.
Warmer climates tend to encourage pests like aphids to hatch earlier, which means they can attack crops when they are younger and more vulnerable, and do more damage.