When climate change started killing the Pacific Northwest's oysters by the millions, scientists and growers taught the world how to safeguard an ecosystem.
To learn how mountain lions and humans can coexist, wildlife biologist Lauren Satterfield follows the elusive animals by car, snowmobile and on foot through the wilderness.
Proponents of increased density say it's better for the climate and housing affordability. Opponents worry about property values and the loss of traditional neighborhoods.