Eco-Terrorism (Earth Liberation Front)

[Barnhart]

ecoterrorism is an entry in the Dictionary Companion (Vol. 6.2).  It
goes back at least to 1989.

There's ecoterrorist (n.,adj.) too.

There are variants, too:

environmental terrorism, ~ist
ecological terrorism, ~ist

Regards,
David Barnhart

David K. Barnhart, Editor
The Barnhart Dictionary Companion [quarterly]
barnhart at highlands.com
www.highlands.com/Lexik

"Necessity obliges us to neologize."
Thomas Jefferson-August 16, 1813