(s) regulate the earth's temperature and the depletion of the ozone.

a. the atmosphere
b. acid rain
c. greenhouse gases
d. carbon dioxide

Who's idea was it for businessmen to use their wealth for the greater good of society? (gospel of wealth ~ap u.s. history

Which of the following is an example of the pull factor known as economic migration? a. better educational opportunities pulling people towards a new country b. mexican laborers entering the us to work in agricultural jobs c. joining family members that are already in a new country d. crop failures driving people away from their country i am unsure on this question, i was thinking b? but i could be wrong.

How did chris mccandless feel before and after going into the wild? i need with a compare and contrast slide for a project