What was one effect of the silk road on china?  
the silk road promoted the exchange of goods and ideas throughout china.
warlords used the silk road as a supply route during battles.
the silk road facilitated the han policy of expansionism.
the silk road created a monopoly for chinese trade.

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

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates