Runoffs from a mine have contaminated the groundwater in a location. This might cause health problems among people in the location. Which of these is the best plan to solve this problem?

Plant trees around the mine to absorb contaminated water

Collect the runoff in retention ponds lined with protective barriers

Put fences around mines to stop the flow of contaminated water

Drain local aquifer into retention ponds to store the contaminants

Collect the runoff in retention ponds lined with protective barriers

Explanation:

The best solution would be to collect the runoff in retention ponds lined with protective barriers.

In order to stop the continuous contamination of the groundwater, it is imperative to cut-off the source of the contaminant which is the run-off. Hence, collecting the runoff in a retention pond lined with protective barriers will ensure that the contaminant's supply is cut-off.

Efforts can then be put in place to decontaminate the already contaminated groundwater.