Slate's columnists not only demand that we accept the most apocalyptic interpretation of the data as gospel (scientists are not used to using terms like 'believe' and 'denier', but okay, the Maoists take taken over the issue)
Again, you're painting with a broad brush, and you seem to have no idea what the people you're talking about actually believe in. I'm a scientist, I don't vote, I'm a libertarian on most issues, and I'm pessimistic about our ability to actually do anything about global warming, but I still think the so-called skeptics are lying sacks of shit. Most scientists I know feel the same way, not because we're committed to some utopian vision of. . . cap-and-trade legislation? - but because we hate seeing paid shills distort the evidence and accuse our entire community of bad faith. It's the same reason that creationism drives us batty.
but that we automatically reject every proposed solution. We're all going to die, because that's the just fate Gaia intends for us as punishment for being fat and eating meat. We can't go nuclear to eliminate carbon! We can't bioengineer better crops!
Okay, time to back that up: when has Slate published screeds against a) meat-eating, b) nuclear power, c) bioengineering? I know for certain that they've run multiple articles in support of bioengineering, and I can remember at least one or two making fun of vegetarians. And it's not like you need to look very far to find a "left" outlet supporting your favored policies; the New Yorker just ran a very critical article about an anti-GMO activist that basically ended with the statement that only bioengineering would save the world.
What I would really like to see is a leftist site that reclaims the spirit of Roosevelt. If we have problems like climate change, energy shortage, war and poverty, let's attack them by building the giant public infrastructure projects that Steinbeck waxed so lyrical about. An energy independence Apollo would address all of these problems at once.
Liberals have been talking about this idea for years, usually by analogy to the Manhattan Project rather than Apollo. You don't see it getting wider reporting because everyone with a brain realizes that it has a snowball's chance in hell of getting through Congress.