EFN may refer to: Businesses and organizations. Environmentalists for Nuclear, a pro-nuclear power non-profit organization. EBMA Festival Network, of which the European World of Bluegrass is a member festival. Education for Nature, founded by the World Wildlife Foundation on behalf of Russell E. Train. Electronic Frontier Norway, a member of the European Digital Rights advocacy group. Element Fleet Management Corp. a company listed on the Toronto Stock Exchange. Environmental Funders Network, cofounded by English environmentalist Ben Goldsmith.
https://en.wikipedia.org/wiki/EFN