Not worrying about aluminum cans and paper bags is the right choice. They were never the problem. Some of that was deliberate disinformation by polluters trying

Not worrying about aluminum cans and paper bags is the right choice. They were never the problem. Some of that was deliberate disinformation by polluters trying to push the problem on you; some was well-meaning environmentalists lacking perspective. However, I would suggest that you should still vote as if humanity is going to survive. We're not going to go extinct, and I think it would be a moral choice to leave a decent planet for whoever is here. Doing that will require collective action, not individual action, and voting is the one way you can influence the collective action. I'll give you another reason to do the same: the people who have engaged in climate disinformation are likely to be making other bad choices as well. Voting for improved climate may not affect your life, but it's likely that you're voting for other issues that do. It's not the most you can do, but it's the biggest result for the least effort.