Although these are all common in our atmosphere, which one is not a greenhouse gas?
a. Carbon dioxide
b. Methane
c. Nitrogen
d. Water vapor
ANS: C
These are common gases in our environment, but we are adding them into our atmosphere at an
alarming rate. There are also CFCs in the category of greenhouse gases. They all act as a glass roof
over Earth that traps heat inside the atmosphere. Information can be found in the section Human
Activity is Causing Global Oceanic Change.
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