The irony of the current climate debate is that both believers and disbelievers want to downplay the inevitability of a climate meltdown. “There’s always hope.” “It’s not happening.” But in our collective gut, we know we are nearing a point of no return. And thanks to something called thermal inertia, even if we never pump another molecule of carbon dioxide into the atmosphere -- like that’s going to happen -- the oceans would continue to warm for another half century. We’ll have to fight like hell to stay even. We sure as hell can’t take another fifty years of business as usual.