The record-breaking year raises concerns about the effects of future natural disasters, as scientists fear climate change could make extreme weather events more damaging.
The culprit appears to be small particles released by combustion, researchers say.
The state's climate features Diablo winds, Santa Ana gusts and drought-dried vegetation waiting to burn.
The reason is more land use and agricultural exploitation, which suppresses wildfires even in an era of climate change.
From agriculture to energy demand, rising temperatures could have profound economic impacts in coming decades, researchers say
Soot from wildfires can melt glaciers over a thousand miles away, scientists find.
Scientists find a 400 percent increase in wildfire destruction in the Great Plains
Interior Secretary Ryan Zinke responded strongly to reports of misconduct. But are words enough to change a culture of harassment, discrimination and bias?
Legislation to allow water in a river delta where fish stocks are depleted to be diverted to farms has divided California Sens. Barbara Boxer and Dianne Feinstein.
President Joko Widodo has announced a moratorium on all activities that could damage the nation’s peat-filled wetlands.