The term ecotage refers to any type of "sabotage that is carried out for ecological reasons." "Sabotage done in the name of protecting nature." (Hendry, 101).
Examples of this include:
The Earth First Movement
A radical environmentalists group that used ecotage through tree sitting and setting fire to buildings in order to call more attention to their cause.
Earth Liberation Front (E.L.F)
A 1992 offshoot of Earth First that began in England by radical members who felt the original movement was becoming too mainstream.