Halloween may have come and gone, but for activists fighting the Keystone XL pipeline, every day the project is allowed to exist portends a terrifying future for the environment

To convey such frightening prospects, environmental group 350.org recently gathered Amy Smart, Justin Chatwin, Wendie Malick and Ed Begley Jr. to film a horror trailer on the Keystone. Titled "Keystone Horror," the trailer is a spoof on the 1979 "Amityville Horror" film. Instead of a haunted house, however, this one involves a home threatened by a pipeline in the backyard. 

Check it out below. 

Related on MNN: