Think of it this way: the best way to reduce the temperature of the planet, for now (and the near future), is to stop emitting CO2.

Very roughly speaking, we're looking at a pot on a gas stove rapidly heating up. Shutting down the gas valve is the easiest and most efficient way to stop it heating up. While the gas is still flowing, it's kind of pointless to ask "Yes, but is there any better way to cool the pot?"