Polish Researchers Develop Clean Coal Technology for Home Use

Thirty-three of Europe’s most polluted cities are in Poland. Part of the reason: in winter, people keep warm by burning coal. Northern China has a similar problem. And it’s a big problem. Burning coal pours particulate matter into the atmosphere, which contributes to global warming and significant health problems. But some simple technology may help reduce the problem. VOA’s Kevin Enochs reports.