Many environmental activists join rallies or marches, sign petitions and lobby legislators. But some feel the need for more drastic steps. In October 2016, five activists known as the “valve turners” halted the flow of crude oil through four different pipelines along the US-Canada border, knowing they would be arrested and possibly convicted.
President Obama vetoed a bill that would approve construction of the Keystone XL pipeline, but that still doesn’t mean the project is officially dead. But with collapsed oil prices and a world moving away from fossil fuels, would Keystone’s builders eventually regret it if they do win approval?