Yeah this is the typical response from a denier. Let’s use a true statement to undercut a greater threat to humanity. Carbon dioxide is a naturally occurring gas, yes. But humanity isn’t producing natural levels of it. We’re producing levels the planet has never seen at a speed that, at this point, is more than likely to kill off ocean life, destroying an environmental ecosystem that sustains human life.
So your argument is that the planet will be fine is great, except some of us would like humanity to survive indefinitely. For that, we should do everything we can to protect the planet and it’s current occupants.