The Earth Liberation Front (ELF) is an eco-terrorist group made up of autonomous cells that carry out attacks on groups accused of damaging the environment ("Earth Liberation Front"). It was established in Brighton, England, by radical members of Earth First! who felt the organization was becoming too mainstream.
Between 1996 and 2002, the FBI estimated that ELF and the Animal Liberation Front (ALF) were responsible for 600 criminal acts in the US, totaling more than $42 million in damages.
ELF was responsible for 55 percent of 239 arson/bombing attacks recorded by the Department of Homeland Security (and attributed to environmental terrorists), between 1995 to 2010.
On August 1, 2003, a five-story 206-unit apartment complex under construction was set fire and destroyed in a San Diego neighborhood. The cost of this act was estimated to be $50 million. A 12-foot banner left at the scene of the fire read “If you build it we will burn it.” Signed “The E.L.F.s are mad.”
References
"Earth Liberation Front." Counter Extremism Project, https://www.counterextremism.com/supremacy/earth-liberation-front.
Hendry, Judith. Communication and the Natural World, Strata, 2010, p. 109.
"In Solidarity With The Earth Liberation Front Patch." Burning Books, https://burningbooks.com/products/in-solidarity-with-the-earth-liberation-front-patch