Yes and no. Greenpeace advocates the advancement of certain techologies over others. For example, in Australia, they're currently trying to drum up support against the government for cutting research into wind power and other renewable technologies. They're also quite into computers as a social network.

But I think they missed the point regarding nuclear power. It's probably a remnant of their hippie origins. After all, Greenpeace was originally created to oppose the testing of nuclear bombs. I wish they'd outgrow that though.