Author Question: The most abundant greenhouse gas in the earth's atmosphere is: a. carbon dioxide (CO2). b. nitrous ... (Read 102 times)

tsand2 · **on:** Jul 13, 2018

The most abundant greenhouse gas in the earth's atmosphere is:
a. carbon dioxide (CO2).
b. nitrous oxide (N2O).
c. water vapor (H2O).
d. methane (CH4).
e. chlorofluorocarbons (CFCs).

Question 2

The only substance near the earth's surface that is found naturally in the atmosphere as a solid,
liquid, and a gas is:
a. carbon dioxide.
b. water.
c. molecular oxygen.
d. ozone.
e. carbon.