Jonathon Porritt, born in 1950, first got involved with environmental issues in 1974, when he was a teacher. Ten years later, he became director of Friends of the Earth, where he stayed until 1991, just before the Earth Summit in Rio de Janeiro in 1992. In 1996, he and others set up Forum for the Future, a nonprofit group in Cheltenham, England, which remains his base. He was also chairman of the British Sustainable Development Commission from 2000 to 2009. His latest book is "The World We Made." Porritt was educated at Eton and Oxford in Britain.