[عائشة هيام]

هادو تاني الاسباب 3 - contamination of groundwater
Supports hundreds of millions of people in the developing world on groundwater, often through dug wells. These can easily be contaminated as a result of human activities are classified into four groups, are the sources of municipal and Alsnallzh participate Related Bmmeltqy Arab Engineers:

- Indoor air pollution
The most important reason to indoor air pollution in the developing world is the burning of coal or firewood for *****ng, heating and Alahzh participate Related Bmmeltqy Arab Engineers: https://www.arab-eng.org/vb/showthread.php?t=231162& # ixzz1qeN0TQbE

5 - the mining industry
Most of the pollution is the result of mining waste disposal, agricultural and Almadenadhaehah Namalut individual in the world: the ten most toxic ».