A large area of greater Los Angeles had unhealthy air Friday, due to particulate matter from large wildfires. Here are tips ...

As wildfire smoke triggers air quality advisories across Southern California, here’s a quick and cost-effective way to build your own air purification system.

The Centers for Disease Control and Prevention says these DIY purifiers can be ... If you plan to buy a portable air cleaner or purifier, the EPA says you should make sure it has a HEPA filter.