Cedar Hills in Maple Valley is ranked among the top 50 methane-producing landfills in the country. But new science and policy breakthroughs could help.
The former Secretary of the Interior helped establish the Pacific Crest Trail, four national parks – including one in Washington – and many groundbreaking environmental laws.
Asahel Curtis shot thousands of images in the early 20th century. Knute Berger talks about the effort to share them with the public for the first time.