The best air purifiers can eliminate indoor pollen, dust, pet dander, and even some germs and airborne chemicals. Here’s what...
Nationwide, almost half are caused by out-of-state emissions.
Millions of Americans breathed unhealthy air in 2018.
Particulates in the air from wildfires make going outside a health risk for many Californians.
It's beautiful and effective, but comes at a high price.
Talk about treeson
New devices let citizen scientists detect local pollutants.
The most polluted city on Earth scored 999 on an index that maxes out at 500
Also works against pollution
Oh, right -- that's why we're doing this climate conference thing!
Like science, tech, and DIY projects?
Sign up to receive Popular Science's emails and get the highlights.