Within 24 hours this week, three major oil and gas pipelines were stymied—two by court decisions and one by economic pressures—in moves that represent a suite of successes for the indigenous and environmental activists long opposed to pipeline development.

The Atlantic Coast Pipeline, a multi-billion-dollar project slated to bring natural gas down the Eastern seaboard, was canceled entirely on July 5. Then, on July 6, a court ordered that the already-in-use Dakota Access Pipeline, designed to shuttle oil from North Dakota to Illinois, halt operations and be emptied of the oil currently in the pipe by August. On the same day, the U.S. Supreme Court upheld a decision to suspend construction on parts of the Keystone XL pipeline, part of a