About half of the acid rain in canada comes from the united states.

true or false

Which objects allow humans to access groundwater? check all that apply.

According to the united nations refugee agency, more than 2/3 of the world's refugees come from just five countries. which country is not on that list? a) turkey b) myanmar c) afghanistan d) south sudan

According to the earth science reference tables, during which geologic time period were the continents of north america, south america, and africa closest together?