The climate has always been changing... sometimes more rapid, sometimes less. Death Valley used to be an Ocean. Greenland used to actually be green. And CA used to be fucking cold at once. There is nothing we can do about that. It doesn't make a difference if you drive a V10 or a 4 cylinder engine. There are more important things to look out for. Asteroids for example, or reduction of plastic bags that they give out for free almost everywhere in the US in ridiculous amounts, or reduction of electricity or stuff like that. It won't change our climate but it will be good for the environment.
In the 70s (or 80s I forgot) they printed in the news and in magazines that the next Ice Age was only years away... did anything happen? I don't think so...