Question

1. open dumping in landfills was outlawed in many states because of ____. their unsightliness groundwater pollution foul odors methane explosions

Explanation:

Open landfills allow toxic leachate (liquid from decomposing waste) to seep into the soil, contaminating underground water supplies. This severe environmental and public health risk was a primary driver for outlawing open dumping in many regions, as it poses a long-term threat to drinking water sources, unlike the more surface-level or less pervasive issues of unsightliness, odors, or less common methane explosions.

Answer:

C. groundwater pollution