Chemical weathering is most rapid in areas that are
a. hot and dry.
b. warm and wet
c. cold and dry.
d. cool and wet.

Why did other countries want to have a part in what was occurring in southwest asia?

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?

Which country in the video has the highest population growth rate?