Where do most of the drugs in the us come from?

What overall charge must all compounds have

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory