When it came to stopping the
dumping of radioactive
waste in the world's oceans (led by UK and not participated in by the US), it was Greenpeace and the Seamen's Unions (in response to their activism) that stopped the
dumping — I was then a scientist / legal activist advising NGOs such
as Greenpeace, AND when the governments eventually got the message that they had to clean up their
act, I helped the UN create better protection of the marine environment.