Eco-terrorism is an act of violence committed in support of environmental causes, against people or property.[1][2]

The United States Federal Bureau of Investigation (FBI) defines eco-terrorism as "...the use or threatened use of violence of a criminal nature against innocent victims or property by an environmentally-oriented, subnational group for environmental-political reasons, or aimed at an audience beyond the target, often of a symbolic nature."[3] The FBI credited eco-terrorists with US$200 million in property damage between 2003 and 2008. A majority of states in the US have introduced laws aimed at penalizing eco-terrorism.[4]

Eco-terrorism is a form of radical environmentalism that arose out of the same school of thought that brought about deep ecology, ecofeminism, social ecology, and bioregionalism.[5]