pollution

Science, Tech & Environment

Rising carbon dioxide levels may reduce the nutritional value of important foods

Rising levels of atmospheric CO2 are already having significant impacts on climate, weather patterns and water supplies. Scientists expect increased carbon dioxide levels will also affect agriculture across the world, in ways we can't predict. The results of a recent study suggest that one of those affects could be quite alarming.

Science, Tech & Environment

What deteriorating air quality looks like around the world

The Chinese government announced Monday that it plans to take more than five million vehicles off the road to improve air quality, including 330,000 cars in Beijing. This announcement comes only weeks after the World Health Organization announced that only 12 percent of cities reporting on air quality meet their standards for safe levels. With the help of our newsroom designers, we put together a list of places recently affected by deteriorating air quality and incidents of smog.

Arts, Culture & Media

Zero emissions race

You need a pretty big battery to drive an electric car for hundreds of miles a day. That's what participants in the 'Zero Emissions Race' did. The race began last August and ended today in a Swiss city that we want you to name…

Health & Medicine

Tehran's air pollution woes

In Tehran, more and more Iranians are buying more and more cars... with predictable results -- congestion and smog. Correspondent Steve Zind reports that air pollution in the Iranian capital is causing health problems for citizens and headaches for city officials.