30 - 干旱

1
Cause

水循环紊乱

水循环紊乱

4
Consequences

See card n26: "If the soil is dried by drought it's worse because the water runs off."

淡水资源

农作物产量下降

2
Other possible causes

森林砍伐

森林砍伐

Deforestation can be the direct cause of droughts because trees stock a lot of water. If they are cut down, they no longer play their part as humidity regulators.

Heatwaves can cause droughts. They often go together.

1
Other possible consequence

碳汇（碳吸储库）

If a lack of rain occurs while plants are growing, there is less photosynthesis and therefore a reduction in capacity of the carbon sink. In Europe, in 2018, carbon sinks declined by 18%.