Well, it's not nuclear power. It's not chemical companies. It's not big oil, or timber companies, or auto manufacturers, or even coal companies. It's the government. At the federal, state, and local levels, government is the single greatest polluter in the Untied States.
Governments are the greatest polluters in the world.
By turning to government for environmental protection, we've placed the fox in charge of the hen house. Government polluters get away with murder because of sovereign immunity. The government doesn't even clean up its own messes. The EPA was simply ignored. No bureaucrats went to jail or were sued for damages.