Nigeria is a country in
a. south america
b. west africa
c. south africa
d. australia

Awatershed is a piece of land that drains water into a particular stream, lake, or river. which of the following factors often negatively impacts the water quality in a watershed? a.) wetlands b.) pollution c.) irrigation d.)rainfall

What is the difference between emigrate and immigrate? ?

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.