Air Pollution

Every Breath You Take Nicola Twilley, in her insightful piece about the overlooked dangers of indoor air pollution, writes that a very unhealthy designation for outdoor air is rare in the United States today (Home Smog, April 8th). This is true, but it is im…

Diesel exhaust is dirty, and a big contributor to the 4 to 7 million annual air pollution-caused deaths around the globe. Its intuitive, then, that any effort to clean that exhaust would be beneficial. But a new study suggests filtering diesel fumes might not…