Stein is not going to win, so a vote for Stein in my contested state is a vote for Trump. A vote for Stein is also a choice to put narcissistic personal feelings of self-righteousness over the fate of humanity - particularly nonwhite humanity and the poor. You are white and comfortable-smug middle-class right? And no, I'm not a "Hillbot", I've voted for the Green or Nader in every election since 1996 including Stein in 2012, but Trump and his fascist followers are not a Romney, McCain, or even GW Bush.
Are you forgetting that switching electric generation from coal to natural gas was a quick way to immediately cut CO2 emissions by 30 percent? it has since become disputed, due to factors offsetting the CO2 savings, but it was reasonable policy at the time. Fracking is what made this this possible as conventional natural gas reserves were largely depleted. No, fracking itself is not the devils spawn any more than any other potentially polluting industrial process is.
Stop driving a car - or at a minimum gasoline-powered one, stop using air conditioning, turn your heat down and wear warm clothes in winter, get a high-efficiency furnace, use only LED lighting, and purchase electricity from a renewable supplier as I have. Join an activist organization in your community and get involved. Quit expecting someone else to take action instead of you.
And believe it or not, you can do these things only because the evil Democrats and Evil Obama have put numerous federal programs in place regarding global warming like these:
LED Bulbs are available only because of federal lighting efficiency standards.
Wind and solar energy is only being developed because of federal renewable generation tax subsidies.
Car manufacturers are developing and making electric cars only because of the $7500 tax credit plus comparable state tax credits to purchasers of EV's
The fuel efficiency of IC engine cars is being improved only because of continuously increasing federal fuel efficiency standards.
Cities are improving their public transit only because of hard-fought federal transit funding assistance in the transportation bills.
Coal power plants are being shut down everywhere in part because of tougher federal pollution regulations - with tougher ones on the way.
If Trump and his even more extremist friends get the reins of government - we have zero prospect of new tough climate measures and our fighting for them will get us is assaulted by the Trump-loving police, and all the above existing stuff will be abolished. If Hillary is elected, we will get some measures, and the chance for tougher measures if we fight for them.