Why did people move out of the indus valley in 1500 bc? a. unchecked deforestation b. for unknown reasons c. the original outbreak of smallpox d. extensive flooding for many years

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

Canada must balance the economic opportunities offered by its natural resources with the need to maintain links to the united states maintain high tariffs preserve the environment protect its borders

In africa what do they call a crop grown for direct sale and not for use?