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Multiple Choice
Which of the following gases is a major contributor to the greenhouse effect?
A
Carbon dioxide (CO_2)
B
Helium (He)
C
Nitrogen (N_2)
D
Oxygen (O_2)
Verified step by step guidance
1
Understand the greenhouse effect: it is the warming of Earth's surface due to certain gases trapping heat in the atmosphere.
Identify the gases listed: Carbon dioxide (CO\_2), Helium (He), Nitrogen (N\_2), and Oxygen (O\_2).
Recall that major greenhouse gases are those that absorb and emit infrared radiation effectively, contributing to heat retention.
Recognize that CO\_2 is a greenhouse gas because it has molecular vibrations that interact with infrared radiation, while He, N\_2, and O\_2 do not absorb infrared significantly.
Conclude that among the options, Carbon dioxide (CO\_2) is the major contributor to the greenhouse effect.