Grist Magazine: Not that Murkowski is a hero of enviros. She’s been doing her darnedest to stifle the EPA on the public health dangers of greenhouse gas emissions, hardly a surprise given the fact that Big Oil has sent almost $500,000 her way since she joined the Senate in 2002. But at least Murkowski acknowledges the human role in heating up the planet. Miller, a Tea Partier backed by Sarah Palin, holds fast to the notion that it’s nature’s way: I think it’s undeniable, that anyone who has …