"the earth's surface, both land and water, and anything that is attached to it whether by the course of nature or human hands" is the definition of?

Does the threat of global warming require international cooperation? why or why not?

Explore the ways that boundaries influence identity, interaction and exchange. things to consider: what is the race/ethnicity. how easy is it to interact/trade with others.

Which country is currently the most populated country in the world? a. india b. china c. mongolia d. indonesia