No need to read past that sentence.
Climate changes. Nothing is really static.
Are humans contributing? Possibly.
Can the human impact be measured? Unlikely due to the amount of variables that are not measured or not measured accurately.
Is it high on the list of what we should be worrying about? Not at all.
Has it been politicized to push political agendas? Bingo - give the lady a cigar.
We have done much to clean up the human impact on our environment since the 1960’s and 70’s. The environmentalist factions needed new troops, new fears to whip impressionable young minds into joining their cause. You can’t see global warming/climate change. This made it the perfect bogyman to focus their attention. Because you can’t see it, you had to take the experts word that it was a problem that would lead to the destruction of civilization if we didn’t toe the line of the leaders.