FYI.

This story is over 5 years old.

Environment

One Hundred Indigenous Nations in US and Canada Join Forces in Opposition of Pipeline Expansion

Standing Rock's Sioux Tribe, the Union of BC Chiefs, and many more Indigenous leaders signed a treaty to prevent expansion of the tar sands.

Serge Simon, left, Grand Chief of Kanesatake, Ghislain Picard, Chief of the Assembly of FirstNations of Quebec and Labrador listen to drummers during a treaty signing ceremony. Paul Chiasson/Canadian Press

Across North America, more than 100 indigenous leaders have signed a treaty against Alberta's tar sands, effectively putting those who want to build oil sands pipelines—including Prime Minister Justin Trudeau—on notice.