[EMAIL PROTECTED] wrote:
> I believe I'm correct that there is a general belief that Global
> Warming is caused by increased greenhouse gases, most notably CO².
> Perhaps you can explain, or tell me where to go, how it is that CO²,
> which makes up just .038% of the atmosphere, is the culprit. The
> reason for my question is that water vapor, also a greenhouse gas,
> varies between 0% and 4% of the atmosphere, which on any given day is
> a much greater variance than the continuing increase in CO². So, CO²
> must have a much greater greenhouse effect in the atmosphere than
> water vapor. Why is this?
Different greenhouse gases absorb and emit radiation in different ways
and with different intensities. Therefore it's not appropriate to
compare the concentrations of greenhouse gases without taking these
differences into account.
For a reasonably good overview of the details, see the Wikipedia article
"greenhouse gas".
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