Question: the danger of mine dumps on the ecosystem

title: Environmental impact of mining
text: Mining can have adverse effects on surrounding surface and groundwater if protective measures are not taken . The result can be unnaturally high concentrations of some chemicals , such as arsenic , sulfuric acid , and mercury over a significant area of surface or subsurface . Runoff of mere soil or rock debris - although non-toxic - also devastates the surrounding vegetation . The dumping of the runoff in surface waters or in forests is the worst option here . Submarine tailings disposal is regarded as a better option ( if the soil is pumped to a great depth ) . Mere land storage and refilling of the mine after it has been depleted is even better , if no forests need to be cleared for the storage of the debris . There is potential for massive contamination of the area surrounding mines due to the various chemicals used in the mining process as well as the potentially damaging compounds and metals removed from the ground with the ore . Large amounts of water produced from mine drainage , mine cooling , aqueous extraction and other mining processes increases the potential for these chemicals to contaminate ground and surface water . In well - regulated mines , hydrologists and geologists take careful measurements of water and soil to exclude any type of water contamination that could be caused by the mine 's operations . The reducing or eliminating of environmental degradation is enforced in modern American mining by federal and state law , by restricting operators to meet standards for protecting surface and ground water from contamination . This is best done through the use of non-toxic extraction processes as bioleaching . If the project site becomes nonetheless polluted , mitigation techniques such as acid mine drainage ( AMD ) need to be performed . 

Answer: answer: Mining can have adverse effects on surrounding surface and groundwater if protective measures are not taken. The dumping of the runoff in surface waters or in forests is the worst option here. Large amounts of water produced from mine drainage, mine cooling, aqueous extraction and other mining processes increases the potential for chemicals to contaminate ground and surface water.