"mainstream environmentalism" . . . . . "'bright' and 'dark' green" . . "Dark greens, light greens and bright greens" . "Bright green environmentalism" . . . "Bright green environmentalism" . "Bright_green_environmentalism#Dark greens, light greens and bright greens" . "bright green environmentalism" . . "Bright green environmentalism#Origin and evolution of bright green thinking" . "Bright green environmentalism#Dark greens, light greens and bright greens" . "environmentalists" . . "dark-green environmentalism" . .