The peak above is part of the , a chain of volcanic mountains that runs through the middle of Central America.

Asap! ! ! western china, northern china and southeastern mongolia are all located in what climate zone? tropical wetdesert humid subtropical humid continental

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.

The blue segment below is a diameter of oo. what is the length of the radius of the circle?