 But in the 1970s, nuclear power became a hot issue in Norway and NU gained organizational strength as it opposed the plans, and won a victory when it was decided to not build nuclear power in Norway.Through the 1970s and 1980s, the organization worked with many issues, including the Alta controversy, and also to prevent environmental contamination, especially from industry.In 1984 members from NU and Greenpeace chained themselves to the factory Titania in Sokndal in a civil disobedience action to prohibit the dumping of 2.2 million tonnes oil and rockdust mixed with chemicals in Dyngadjupet in Jøssingfjord.