It fails even more badly when you consider that the incremental greenhouse effect drops off rapidly as the CO2 concentration increases, so that doubling the concentration increases the greenhouse effect by only a few percent, and doubling it again increases
the effect by a few percent of that few percent.
Not exact matches
Other models, he notes, «say the clouds are going to reduce in quantity
by a
few percent, enough to let more sunlight in and enhance the greenhouse
effect.»
[Reply: Different forcings (of the same nominal value) can have a slightly different temperature
effect indeed (as indicated
by the «efficacy ``, but they generally differ
by a
few 10s of a
percent, not
by a factor of 3.
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