One problem that arises with monitoring freshwater supplies is that it can take years to detect pollution in underground water. There is no federal regulation of groundwater. The world is mostly covered with water. Most freshwater supplies are found on the surface of Earth.

Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

Explain: plate tectonics and people.

How did the korean war impact the elections of 1952?