Reuters: Aboriginal tribes from Canada and the northern United States signed a treaty on Thursday to jointly fight proposals to build more pipelines to carry crude from Alberta`s oil sands, saying further development would damage the environment.
The move came as Native American tribes on Thursday took their fight to Washington to stop development of the $ 3.7 billion Dakota Access oil pipeline, which would cross federally managed and private lands in North Dakota, South Dakota, Iowa and Illinois.
Last...