In kicking off its seven week series, the talented and witty team at Grist pondered the paradox of U.S. environmentalism: "In much of popular and political culture, the movement is dismissed as the pet cause of white, well-off Americans -- people who can afford to buy organic arugula, vacation in Lake Tahoe, and worry about the fate of the Pacific pocket mouse." This perception, and how the environmental community responds to it, will determine whether it becomes a movement for everyone, or just for those with a Nalgene in every cupboard and a Gortex in every closet. Many Americans, environmentalists …