Which is mainly resopnsible for preventing erosion

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa

Which of teh following would explain the importance of the trans-siberian railroad to russia's economy? (schoology test)