Floods,droughts,pollution and climate change have created even more problems.

VOA: special.2010.04.05

The World Health Organization estimates about two million people die prematurely every year due to air pollution, more than half in developing countries.

VOA: standard.2009.03.23

Someone just needs to give them a little spark." More than 50,000 children die each year in Yemen because of diseases caused by water pollution.

VOA: standard.2010.04.01

"The pollution issues are even more acute in the big urban areas,".

VOA: standard.2009.03.23