[Lonesome in Massachussets]

I think I pointed out that that 400 ppm keeps the earth from being a frozen cueball. 0 ppm a frozen cueball. 400 ppm sort of comfortable, so far. 600 ppm ? Please read my post:

It is not clear whether or not current CO2 levels are excessive, near optimal, or below optimal. No. One. Knows. What we do know is that humans have thrived and adjusted to the current levels. Carelessly and thoughlessly altering them is dangerous. We should be cautious. We need not panic. The energy economy of the Twentieth Century led to unprecedented increases in human well-being. It would be utterly foolish, criminal actually, to precipitiously abandon its benefits to humanity, but we need to recognize that there are risks.

[Bob434]

reasd it- still say

[[It is not clear whether or not current CO2 levels are excessive, near optimal, or below optimal]]

Sure there is- records show ppm well into the 1000’s and life survived just fine . 400 ppm is nothing- but greenies make it seem like we’re 1 part per million away from mass extinction

We’re fine- will be fine with higher- will be fine with lower- we were 300 ppm or so not long ago- Nature controls co2- our contribution is negligible- in hte grand scheme of things our co2 production is a drop in the ocean