In article , HeyBub wrote
in part:

What difference does it make if we release more carbon? At the current
level of 0.003% of the atmosphere,

Make that .038% by volume, .0575% by weight.

a doubling would be virtually undetecable -
except for plants who would say "Yum!"

Current level of CO2 accounts for anywhere from 9 to 26% of
current "greenhouse effect" (warming of the planet from a level that would
exist if not for any greenhouse gases at all including water vapor).

How well have plants fared now that atmospheric CO2 content is about 36%
above pre-industrial-revolution levels? It appears to me that the
limiting factors are water, daylight and favorable temperatures more than
CO2 content in the atmosphere.

- Don Klipstein )