One of the reasons for this is because you're not actually responsible for all that much as a middle class and below person. Yeah, get better fuel efficient cars. Yeah, eat less meat. Yeah, get the most out of what you can when you buy things. But that's not going to do much while corporations are still chugging along. It won't do much while coal and gas are the primary energy production. Sure, use less electricity and get onto renewables as much as you can but the offenders will buy these nonsensical carbon credits and such that cause issue.

The real answer is definitely vote Democratic, one cannot vote democrat as that's not a party in the US. But more than that it gets involved in the political process such that change to our policies are done with climate change in kind. You won't get that from Republicans.