The claim, now, is that atmospheric CO2 has reached 415 parts per million (ppm), according to the Scripps Institution of Oceanography.

That is, as the panicky scream goes, the highest level ever in human history.

And

Earth science analyses show that the atmosphere last contained this much CO2 some three million years ago, when global sea levels were higher and parts of Antarctica were blanketed in forest.

There’s a hint there regarding the lushness of life on Earth.

Sadly, a couple of things are being ignored by the climatistas.  One is that the only outcome of sea levels being higher is that humans living on the coast will be inconvenienced by having to move inland, neverminding that they’ll be able to continue their coastal lives.

The other thing is that in those 3 million years since, we’ve had a very severe ice age and several 40,000-100,000-year cycles of glaciation, the latest one of which ended only about 10,000 years ago—and we’ve not recovered yet: we’re still a few degrees below the geologic global warming trend line.

But there’s money in that manufactured hysteria.