Which of the following statements about the earth's atmosphere is true? it contains 21% oxygen. it contains 78% water vapor. it contains 21% carbon dioxide. it blocks all radiation from the sun.

Why should the united state be concerned about air pollution in china?

2. if someone had the list of traits you provided in question 1, do you think he or she would be able to find you in a group of 1000 people? why or why not? if not, what other information encoded in your genes might distinguish you from the others in the group? what are other traits that are encoded for by dna?

How does science influence the decisions made about social, economic, and political issues?