It doesn't need to be but many environmental groups and politics are. Personally I think there's working class environmentalism and liberal environmentalism which tends to stress moralist answers (trees always trump human needs) and individualism "doing with less" or "reducing your carbon footprint".
In fact a lot of the individualist soft-environmentalism is actually a "progressive" veneer over free-market logic: watch what you buy (the market will then weed-out anti-environmental companies and products), green technology (don't limit industries ability to pollute because the market will sort itself out eventually). And of course the US government has taken the same approach at least since Clinton. "Cap and Trade" for example... which would be like regulating speeding by saying that if you drive 40 mph in a 70 mph zone, you could sell the unused mph and then that person could drive 70 mph plus an extra 30 mph!


