Which challenge would affect access to clean drinking water?

A landfill near a growing community can leak polluted liquid into nearby soil and groundwater, which may be sources of drinking water. That makes the large landfill the clearest challenge to access to clean drinking water. Automobile emissions, forest fires, and ocean trash can cause environmental harm, but they are less directly connected to a community’s drinking-water supply here.

AI-written and checked against the verified answer.