The Obama administration has reached an agreement with Oregon ranchers to protect sage grouse that the ranchers hope will help avoid having the bird listed by the federal government as an endangered species.
About 100 birds in the San Francisco Bay Area have been discovered with their feathers coated with a mysterious substance that looks and feels like rubber cement.
Environmental advocates will lose an ally in Congress when Barbara Boxer leaves the Senate at the end of her term in 2016 after more than three decades in office.
Researchers estimate the more than 5 trillion pieces of plastic would fill over 38,500 garbage trucks.
As global warming causes Arctic ice to melt, the Coast Guard is working on creating new shipping lanes so vessels can safely travel through the now open waters.
In Washington, Oregon, Utah and other parts of the West, beavers increasingly are being used as an effective, low-cost tool to help restore rivers
Marine biologists are seeing higher-than-normal ocean temperatures that are causing near-shore bleaching across the islands.
The animals are unable to find enough sea ice, where they usually rest in the Arctic Ocean.
Several environmental groups are appealing a decision by Skagit County officials that they say will allow a proposal for an oil-train facility at an Anacortes refinery to move forward without a serious review of the risks.
Animals and plants that depend on snow cover may be affected.