What is the greenhouse effect?
Correct answer: Heat kept in the earth
Nostromo
Technically & scientifically, that answer is not even close... :)
Tom
Nostromo,
I agree, it is not heat, which is the vibrational energy of matter.
It is Infrared EM radiation (mostly).
poopy pants
not in Earth, but in the atmosphere of Earth
Keomi
heat kept in the atmosphere of the earth