I don&#x27;t think we&#x27;re on the same page.<p>First, we seem to call different things an <i>experiment</i>. The guy didn&#x27;t made
any experiment, he just charted some data. He didn&#x27;t change CO2 concentration
in the atmosphere, keeping everything else equal, to check if it would affect
the resulting temperature.<p>Next, he only charted temperatures. This doesn&#x27;t prove anything related to
carbon concentration by itself, and we don&#x27;t have <i>proven</i> models to have
a causality implied one way or another. (Proven with analogous strictness and
confidence as the theory of gravity.)<p>And finally, I don&#x27;t claim there is <i>no change to the climate whatsoever</i>.
Quite the contrary; humanity has <i>seen</i> the climate to change over its recent
history (few hundred years). I just doubt highly that the change is caused by
human carbon emissions.<p>And personally, I think it&#x27;s really arrogant to assume that humanity is
powerful enough to change the climate of the whole planet at this point.