Stepping into the Heartland Institute's "2008 International Conference on Climate Change" was like walking into an alternate reality. To the rest of us, climate science is settled, the solutions are sensible, and the time for action is now. But in the Marriott Grand Marquis Times Square, the only science comes from industry-funded think tanks; climate action will destroy humanity; and the underdog in this fight is ExxonMobil. Photo: Justin Shearer Perhaps more accurate than alternative reality, the event was about denying reality. Global warming isn't an abstract possibility. It's already raised temperatures, stressing species from salmon to moose, triggering more …