There's always someone that comes out with this nonsense. It's usually an American. They usually are white, middle-class, male and middle aged. Good enough education to work as a middle manager, not good enough to progress higher. No science background, probably an engineer.
Other than 'engineer', sounds a lot like one Michael Mann, inventor of the (in)famous 'Hockey Stick'. And in the news* again for possibly losing a defamation lawsuit on account of refusing to show his working. How very scientific.
But such is politics. CO2 is the single biggest threat to personkind, therefore we need to give trillions to the Green Blob to save us from the phantom molecule. Act now, give generously and damn the consequences.. Unless of course CO2 isn't much of a threat, and has some potential benefits.. like the 'greening of the Earth'. Then that money is wasted.
*Well, not the MSM. Which is odd because if Mann 'won' (as he claims), then surely this would be an important victory for science..