5. Why are people concerned with the pollution of groundwater
resources?
I

Its advancing boundary, often called a plume edge, can intersect with groundwater wells or daylight into surface water such as seeps and springs, making the water supplies unsafe for humans and wildlife. ... Using polluted groundwater causes hazards to public health through poisoning or the spread of disease.

They are concerned because that is natural water. Water, for ALL organisms is needed to live, so we also have to keep it safe for us and there life to live.

Explanation:

hope this helps

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.