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From its beginnings at a bucolic Canadian lake to shipwreck dangers at its mouth, the Columbia River has defined the region's history and culture.

As the state considers removing the species’ endangered status, some argue that the Colville Tribe’s recent population estimate is implausibly high.

The death of the whale at a Miami amusement park just before her planned release highlighted the species’ fraught relationship with humans.

Allocating funds from the carbon plan to minority communities most affected by pollution could draw legal battles based on the new SCOTUS decision.

People flocked to see a young orca lost in a river near Portland. Then she was killed, pickled and left in a tank on a mountainside.

Reforestation starts with sufficient seed supply. The state Department of Natural Resources is partnering with the U.S. Forest Service to restock it.

From Seattle to Baltimore, cities are recycling felled urban trees into furniture, construction projects and guitars.

Washington, Oregon and California could soon see floating turbines off their coasts.

Like much of the West Coast, the state needs a regulatory overhaul if it wants to take advantage of emerging ocean aquaculture.

Protective structures can help save properties from erosion, but by blocking the natural flow of sand and sediment, they can accelerate erosion elsewhere.