Weathering and erosion slowly chisel ... forming an acidic concoction that dissolves rock. For example, acid rain dissolves limestone to form karst, a type of terrain filled with fissures ...

The deflation of the upland limestone landscape by slow solution weathering is demonstrated ... including human factors such as acid rain. The contrast between eratic and limestone beneath can ...

In the 1970s, acid rain was one of the most serious environmental threats in North America and Europe. The air was so laden with pollution from coal power plants and cars at the time that it turned ...