Which of the following is not a long-term consequence of mining on the earth? a) erosion b) an open pit c) sedimentation d) environmental degradation e) none of the above

I think all these answers a interlinked. They lead to some kind of longterm effect on the earth. For example, an open pit can collapse sue to rain, water or wind eroding its sides causing the pit to collapse. Mining makes the environment look unpleasant or less appealing, Environmental degradation. The ANSWER IS E none of the above.

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.