30 - 乾旱

1
Cause

水循環紊亂

水循環紊亂

4
Consequences

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

淡水資源

農作物產量下降

2
Other possible causes

森林面積減少

森林面積減少

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

碳匯(Carbon Sink)

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%.