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

Not far from where Ceci Carroll lives, a rock-mining company has polluted the air with dust across the San Gabriel Valley, she said. Now, as crews clean charred remains from the Los Angeles wildfires, ...

Reps. Laura Friedman, D-Burbank, and Judy Chu, D-Pasadena, were joined by Reps. Brad Sherman, D-Sherman Oaks, and George ...

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.

Farmworkers are left with little to no protection from wildfire smoke. L.A. County's recent fires put the lack of protection into perspective.

When a fire burns in an urban area, it unleashes a slurry of chemicals. Scientists are trying to understand the chemistry at ...

Residents describe experiences of sore throats and other symptoms. The energy storage industry insists that this incident is ...

Toxic chemicals from L.A.'s fires are going underreported and pose serious long-term risks, a group of lawmakers says. They ...

The level of stakeholder buy-in required to propel electrification in trucking cannot be overstated, as a single example in ...

South Coast AQMD—the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside and San Bernardino counties—covers an area of 10,743 square miles that is ...

You've heard of AT&T Fiber, but did you know AT&T rolled out its own 5G internet service? Let's take a closer look at what AT ...