dpb wrote:
jo4hn wrote:
...
hundreds, if not thousands of years. New Vostok data have extended
the historical record of temperature variations and atmospheric
concentrations of CO2, methane and other greenhouse trace gases (GTG)
back to 420,000 years before present.
...

Which all indicates that the previous temperature rises (greater by far
than the recent) all _precede_ the CO2 levels thereby negating the cause
of higher temperatures being CO2 but rather that it appears that the
rising temperatures resulted in higher CO2 levels (probably by
stimulating additional plant growth???)

IOW, it refutes the hypothesis currently being posited as the causative
factor.

--
The cause and effect relationships are not known at this time. Data
supports neither possibility.