What does mining do to an area?

Ais a survey that focuses on only a small portion of the population, and the results are generalized for the larger population.

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

You could say the relative location of washington, d.c.