What is the name for the lowest layer of the atmosphere, which is most influenced by human activities?
a. terrasphere
b. stratosphere
c. mesosphere
d. troposphere
e. ionosphere

Which of the following statements is most likely a characteristic of an authoritarian government in africa

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?

What can happen to solar radiation when it enters earth’s atmosphere? check all that apply. it is absorbed by earth. it is reflected by clouds. it is reflected by glacial ice. it is condensed into visible light. it is amplified by water molecules.