so what is wrong with this statement?
"The greenhouse effect occurs because the sun bombards Earth with enormous amounts of radiation that strike
Earth's atmosphere in the form of visible light, plus ultraviolet (UV), infrared (IR) and other types of radiation that are invisible to the human eye. UV radiation has a shorter wavelength and a higher energy level than visible light, while IR radiation has a longer wavelength and a weaker energy level. About 30% of the radiation that strikes Earth is reflected back out to space by clouds, ice and other reflective surfaces. The remaining 70% is absorbed by the oceans, the land and the atmosphere, according to
NASA's Earth Observatory."
The science isn't correct.
The greenhouse effect occurs because triatomic (and larger) molecules in the atmosphere allow the sun's visible light to pass them and impact the surface of the earth, where they are absorbed and reradiated in the infrared, which these same molecules can absorb on the rebound headed toward space, and reradiate again some of those photons back to earth.
That's how atmospheric gases mimic a greenhouse and your car, which do the same thing with glass. Glass transmits the sun's visible light into the greenhouse or the car's upholstery, and then reflects the upward radiated infrared back down toward the plant or car seat, warming them up.
Nothing in the above is relevant to the greenhouse effect, which is unrelated to reflected light. It is related to absorbed and then reradiated light. Reflected visible light is also visible, and can pass by the greenhouse gases going back into space as easily as they did coming in. But not the IR.
Diatomic atmospheric molecules like O2 and N2 comprise most of the atmosphere. The are transparent to both visible and IR light, so don't trap surface radiation, which goes into space.
If you're interested in why molecules of three or more atoms can absorb the infrared coming up from the earth, absorb it, and reradiate it back down, when diatomic molecules cannot, you'd need to consider the degrees of motion possible in a 3-atom molecule not available to diatomic molecules. The latter can translate, rotate, and expand/compress like an oscillating spring, but only 3- and 4-atom molecules (CO2, H2O, O3, CH4) can also flap like bird wings, and that seems to be the relevant difference.
Don't you just love understanding science? How cool was that?
No, the hyper "the sky is falling" is a fear tactic that causes emotions to run high and intelligence run low.
You too? Another RFer is complaining about that as well these days. He also blames the warnings of the informed for the ignoratti running around like headless chickens swallowing antiparasitic horse paste.
I don't think that admonishing people for being irresponsible is either a fear tactic, nor the explanation for why intelligence runs low in them.