In the 1970s, groups like the Union of Concerned Scientists went from seeking nuclear disarmament to blocking the construction of nuclear power plants, eventually joining forces with other anti-nuclear groups, Friends of the Earth (FOE), Natural Resources Defense Council (NRDC), Sierra Club, and Greenpeace. All of those groups were as focused and perhaps more focused on stopping the construction of nuclear power plants as they were on any other cause in the 1970s, including and especially stopping coal power plants, which were the main alternative to nuclear at the time.
