| http://www.w3.org/ns/prov#value | - All you can do is decide which side has the most trustworthy spokespeople and trust them.Even if you got a Ph.D in the subject, you would still only have an opinion and be faced by many opposing Ph.D's.There is a fact or two you can check: Global CO2 levels have been rising steadily over the last century or two and there have been consistent direct measurements of the level over that time.
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