|Photo: © Curt Carnemark / World Bank|
All "new" priorities risk diverting attention from "old" ones. Climate change seems no different. It seems likely that climate change, through its impact on temperatures and rainfall, will have negative affects on existing water stress in many countries. Crop water demand will increase with temperature, rainfall will decrease in many areas and become more erratic in most. Further, we are already substantially over-drafting many aquifers and damaging river eco-systems.
In parallel with these concerns, Vorasmarty et al (2000) estimate that the impact of economic and population growth will substantially exceed the impacts of climate change on the water demand/supply balance.