Catholic Church. Pope (1963-1978 : Paul VI), Pope Paul VI (1976). “On evangelization in the modern world: Apostolic exhortation Evangelii nuntiandi, December 8, 1975”
Al Gore's testimony before the U.S. House of Representatives Energy and Commerce Committee's Subcommittee, and the Science and Technology Committee's Subcommittee on Climate Crisis, abcnews.go.com. March 21, 2007.