How can I not obsess? The world might end if the gov. doesn't tax enough!
Pollution is a tragedy of the commons. Individually, polluters gain more than they suffer. But collectively, they suffer as well (though I admit it remains to be seen how much, since the IPCC reports on economic impacts leave a lot to be desired [1]).
It is the job of the government to maintain the commons, because it can't get maintained through individual incentives alone.
At least until 2020, emissions have matched the worst case scenario analyzed by IPCC: https://www.pnas.org/doi/full/10.1073/pnas.2007117117
At the same time, the US has no greenhouse emissions taxes.
But let's just stop worrying and enjoy life. Let all polar species get replaced with tropical ones, and let the tropics become barren scorched desert. (this is mockery of the post)
I say: don't obsess over it, but do what is within your influence to steer towards a better future. For instance, my comment here coupled with an upvote to the post would maximize the exposure to potential US lawmakers.