Carbon dioxide (CO2) keeps INFRARED light from leaving the Earth. *

True
False

I believe it is true.

Here some info to back it up  

Carbon dioxide (CO2) is also an important greenhouse gas. It has a long lifetime in Earth's atmosphere. Carbon dioxide strongly absorbs energy with a wavelength of 15 μm (micrometers). This makes carbon dioxide a good absorber of wavelengths falling in the infrared radiation region of the spectrum.

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