As wildfires have burned recently across southern California, the ash from burned trees and brush is lifted in the air, then ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

Thousands of farmworkers labored in fields in Ventura County, Calif. in late January in wildfire smoke. They have little to no protection from its harmful effects.

The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.