What human activity affect water availability?

Question 1

What human activity affect water availability?

Answer 1

Global warming
Conflict and political reasons
Contamination/pollution 
Population growth: greater demand
Greater use in industry- development 
More water intensive processes 
Agriculture
Dams- increase and decrease supply

Question 2

Pollution of supply:

Answer 2

Sewage disposals
Problems of disease: cholera & typhoid
Especially in informal settlements
Farming- eutrophication: pesticides, fertilisers in groundwater and surface supplies
Industrial pollution- TNCs relocating industry in places where environmental controls are lower.