How and why do people remove nitrogen from the earth’s crust?

Which is the correct formula for photosynthesis

Which type of landforms forms at the plate boundary as a result of divergent stress

What is point source pollution of an aquatic ecosystem? a) pollution of freshwater sources b) pollution from many sources that combine into one c) pollution that occurs over a wide area; water that runs off from fields, parking lots, and other land surfaces d) pollution that can easily be identified with a single discharge source, such as an open pipe which drains into a body of water