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

All you need is a box fan, good air filters and some duct tape, and you're in business. NPR has previously posted a design and guide to building an air purifying cube known as a Corsi-Rosenthal ...

All you need is a box fan, good air filters and some duct tape, and you're in business. NPR has previously posted a design and guide to building an air purifying cube known as a Corsi-Rosenthal Box, ...

(Air Now/ Screenshot by NPR) All you need is a box fan, good air filters and some duct tape, and you’re in business. NPR has previously posted a design and guide to building an air purifying cube ...

With Paddington in Peru having already been released in the United Kingdom, and expected to make its way into the United ...