Too many people have blindly believed Al Gore, preaching from his private jet, that CO2 is toxic and will be the death of us all. It doesn't just come from cars, airplanes and big bad coal plants. We actually exhale it every second of every day. Also, I've never asked them, but I'm confident plants are pretty big fans of CO2 since they live off it.
So I have a solution. Stop breathing. Not only will you decrease your "carbon footprint," but those of us with common sense won't have to listen to you any more.