One thing you constantly hear is "CO2 is not pollution!"
Wake up and smell the coffee people! WE ARE CHANGING THE ENVIRONMENT AROUND US.
If CO2 is not technically a pollutant, too much of it can still cause damage. Just like too much ozone, or even water.
Repeat after me. Actions have Consequences. Yes, overreacting to environmental issues (live in caves! Eschew personal hygiene! Don't have babies!) is a bad idea.
But so is ignoring our actions and how they interact with the environment around us.