Greenhouse Effect
http://en.wikipedia.org/wiki/Greenhouse_effect
By their percentage contribution to the greenhouse effect on Earth the four major gases are:[21][22]
water vapor, 36–70%
carbon dioxide, 9–26%
methane, 4–9%
ozone, 3–7%
The major non-gas contributor to the Earth’s greenhouse effect, clouds, also absorb and emit infrared radiation and thus have an effect on radiative properties of the atmosphere.[22]
From the same Wiki entry about the Greenhouse Effect.
In the Solar System, Mars, Venus, and the moon Titan also exhibit greenhouse effects; that on Venus is particularly large, due to its atmosphere, which consists mainly of dense carbon dioxide.[37] Titan has an anti-greenhouse effect, in that its atmosphere absorbs solar radiation but is relatively transparent to infrared radiation. Pluto also exhibits behavior superficially similar to the anti-greenhouse effect.[38][39]
I remember when POPULAR SCIENCE said they would never mention GREEN HOUSE EFFECT again as the found it was bogus and an ice age was really coming.
Then about ten years later, they were hyping GLO-BULL WARMING!
See post #18