Cambodia: Concerns Over Illegal Mining

But the toll on the environment is increasing, especially that on natural water resources, Chhut Wutty said. The government must regulate the use of chemicals such as mercury, he said. 

“This business absolutely has an impact on the environment, causing changes in water quality even more than deforestation,” he said. 
http://www.phnompenhpost.com/index.php/2011121653444/Business/concerns-over-illegal-mining.html