You had me until:
“CO2 matters, because a dangerous buildup of the gas in the atmosphere – caused by the growing consumption of fossil fuels and the decimation of our forests – is causing the earth to warm to such dangerous and unprecedented levels that the health of the planet and its inhabitants are imperiled.”
This is, at best, “not proven”. CO2 levels are still lower than they have been at many times in the past, and at none of those times were the health of the planet’s inhabitants imperiled as a whole. There have been many times when many times when climatological cycles have altered the climate of the planet enough to affect various species, but life as a whole has rarely been imperiled.
Short of the sun going nova, there is nothing that can imperil the health of the *planet*. You might be able to argue that some radical shift (and I do mean radical, such as no oxygen, or precipitous drop in nitrogen) in the atmosphere could imperil the *biosphere*, but even then, that’s not what we’re talking about here. Geologically speaking, we’re in an interglacial period. Based on a review of various climatological records, we’re probably at or near the peak of this one. Our current climate is distinctly not the norm for this planet over the past several million years. The norm is way way colder. But, even if the climate does shift out of its historical pattern, there is almost no evidence that a warmer climate will cause anything like the destruction implied by the greeners. Generally warmth=life on this world.