How London is fighting its nightmare traffic

We took a look at London, a city that enacted a congestion charge in 2003, to see some of the benefits. Check out the video above to learn more.

How noise pollution is ruining your hearing

Health organizations warn that continual exposure to noise levels above 70 decibels can potentially damage your ears. And yet we are routinely exposed to noise much louder than that in everyday situations. Our world is increasingly noisy and our bars, restaurants, gyms, and streets all produce decibel levels that can cause harm to our hearing in mere minutes. Hearing loss is incredibly common and is the fourth highest disability worldwide. One in four American adults shows signs of noise-induced hearing loss, and the problem is only going to get worse.