What are some causes and effects of water shortage around the global?

causes:

Climate change, such as altered weather-patterns (including droughts or floods), deforestation, increased pollution, green house gases, and wasteful use of water can cause insufficient supply ... All causes of water scarcity are related to human interference with the water cycle.

effects:

The effects of water scarcity can be grouped into these 4 broad areas - Health, Hunger, Education, and Poverty. people die off. Less water also means sewage does not flow, and mosquitoes are other insects breed on still (stagnant) dirty water. The result is deadly malaria and other infections.

-ari.