U.N.: Air pollution "wreaking havoc on human health"

The U.N.'s World Health Organization reports millions of deaths due to rising air pollution in cities worldwide

From: http://redirect.viglink.com?u=http%3A%2F%2Fwww.cbsnews.com%2Fnews%2Fun-rising-air-pollution-in-cities-worldwide-hurting-killing-millions%2F&key=ddaed8f51db7bb1330a6f6de768a69b8