Define greenhouse effect, carbon source, tropospheric ozone vs. stratospheric ozone, cop21

Which factors add to the greenhouse effect and are caused by human activities?

What effect has the drug trade had on some governments in middle and south america? a. it has funded political instability. b. many nations have created democratic governments. c. many governments have allowed the drug trade to fund local programs. d. it has funded political stability.

The galápagos islands belong to which country