Rachel Wald always has a bit of a cold. That’s life when you have two kids younger than 5, she says. You’re always a little ...

Carbon particles are present in many aspects of our daily lives. Soot, which consists of tiny carbon particles, is generated ...

Anyone who spends time on the streets of Bangkok these days is putting themselves in serious danger. Since the beginning of ...

South Korea was suffocated by thick ultrafine dust for the second day in a row Wednesday, prompting authorities to regulate ...