The mainstream environmental movement spends its time urging government to regulate corporations that are making people sick while poisoning the planet's air, water, and soil.
Regulation is what mainstream environmentalists aim to do.
They gather data, write reports to show how bad things have gotten, and then they ask government regulators to modify the behavior of the responsible corporations. They pore over immense volumes of technical information, becoming experts in arcane sub-specialties of science and law. They work hard, much harder than most other people. When they find that their efforts have been ineffective, they redouble their efforts, evidently hoping that more of the same will work better next time. Environmental Defense Fund, Natural Resources Defense Council, Sierra Club, Audubon, National Wildlife Federation, The Wilderness Society, The Environmental Working Group, and many others that make up the mainstream environmental community are well-intentioned, earnest, and diligent.