Kathmandu, March 13 -- Air in Kathmandu Valley has already turned toxic and the peak forest fire season is nearing.

Across the western U.S., wildfires are becoming larger and more severe—and even trees that initially survive are dying in subsequent years, making it harder for forests to regenerate, according to new ...

Humans have altered the forests of western North America markedly over the past several centuries. We’ve suppressed fire, harvested much of the old-growth trees, and built homes and communities within ...

Mount Hood National Forest and Columbia River Gorge Scenic area have banned all campfires — even in developed campgrounds — due to high fire danger. Willamette National Forest has banned fires except ...