Southern Resident killer whales, whose range is from Northern California to Canada, have not had enough food for several years, which could affect their already small numbers.

Despite the deep political divides that exist in the state, Oregonians on both sides of the political spectrum agree wildfires are a major concern.

Companies that want to sell shampoo bottles, food products and other items wrapped in plastic in California will have to cut down their use of the material.

A new map identifies wildfire risk levels from zero to extreme on 1.8 million tax lots across Oregon. State officials will use the map to determine which properties will be subject to new fire safety requirements.

Oregon Gov. Kate Brown said the Supreme Court decision undermines 50 years of progress under the federal Clean Air Act.

Scientists are hoping to locate the carcass of an orca spotted off the Oregon Coast. This may be the first instance of a dead killer whale seen in the state.

Owens-Brockway, a glass recycling facility in Northeast Portland, has committed to install a filter to one of its furnaces to curb air pollution after reaching an agreement with state regulators.

The U.S. Supreme Court, in a 6-3 decision, ruled that the Environmental Protection Agency does not have the authority to mandate carbon emissions from existing power plants.

The scientists aboard the research vessel Thompson are trying to answer complicated questions about what makes volcanos, specifically the Axial Seamount, tick. But sometimes the most serious scientific inquiry can face "crabotage."

As temperatures reached into the 90s on Monday, environmental nonprofit Verde delivered electric heat pump systems to help cool vulnerable households in Portland’s Cully neighborhood.