Ashley Ahearn

In the past two years, more than 800,000 acres in northern Nevada have burned. The traditional sagebrush rangeland is being replaced by cheatgrass that burns hotter and more frequently.

Australia is no stranger to periods of extreme heat and drought. But after years with little rain, many farmers in the country's southeast are simply giving up.

The National Park Service is transporting hundreds of wild mountain goats from Olympic National Park to the North Cascades in Washington state.

In a blow to the coal industry, a new terminal in the Pacific Northwest was denied approval after opposition from environmental groups and a debate between local Native American tribes.

The Port of Seattle has leased space to Shell Oil to dock ships and store Arctic drilling rigs in the off season. City officials and environmentalists question that decision and want Shell out.

Two dams blocked the river for more than 100 years. The lower dam is completely gone and the last 30 feet of the upper dam were blown up this week. Now, the river is returning to life.

The Environmental Protection Agency and state Department of Ecology have moved in to monitor water pollution and hazardous materials. Residents living in the area have expressed concerns.

Scientists are worried about the elusive members of the weasel family that live in parts of Olympic National Forest in Washington state. To see whether martens are endangered, volunteers are installing remote camera traps to take photos of the animals.