Environmental Defense Fund

Environmental Defense Fund or EDF (formerly known as Environmental Defense) is a United States-based nonprofit environmental advocacy group. The group is known for its work on issues including global warming, ecosystem restoration, oceans, and human health, and advocates using sound science, economics and law to find environmental solutions that work. It is nonpartisan, and its work often advocates market-based solutions to environmental problems.

The group's headquarters are in New York City, with offices across the US, with scientists and policy specialists working worldwide. US regional offices include Austin, Texas; Boston; Boulder, Colorado; Los Angeles; Raleigh, North Carolina; San Francisco; Washington, D.C. and St. Petersburg, FL. The group has a growing international presence, with offices in London, Brussels, Mumbai and Beijing.

Fred Krupp has served as its president since 1984. In May 2011 Krupp was among a group of experts named by US Department of Energy Secretary Steven Chu to a subcommittee of the Energy Advisory Board that was charged with making recommendations to improve the safety and environmental performance of natural gas hydraulic fracturing from shale formations. The subcommittee issued an interim report in August and its final report in November of the same year.

In 1991, The Economist called EDF "America's most economically literate green campaigners." The organization was ranked first among environmental groups in a 2007 Financial Times global study of 850 business-nonprofit partnerships. Charity Navigator, an independent charity evaluator, has given EDF a four-out-of-four stars rating overall since June 1, 2012.