Libertarian Party candidate for president Gary Johnson says we should do nothing about global warming.
That means Gary Johnson isn't a libertarian on global warming. Libertarians aren't in favor of letting one party (the coal, oil and gas industries) harm everyone else with no consequence. They're in favor of minimal government intervention, sure - say, a carbon tax - but actual libertarians aren't any more in favor of letting polluters run rampant than they are in letting murders walk free.
Johnson is a climate nihilist, saying the world's going end someday anyway, so why bother trying to protect our children? As with his Syria ignorance, Johnson seems like a dim bulb with no interest in serious policy.
I'm voting for Hillary Clinton, the strongest pro-science candidate with a strong climate policy.