Speaking of Chemistry (IMAGE) American Chemical Society Caption We've had the delightful benefits of air conditioning and refrigeration for more than a hundred years now. In the early days, dangerous chemicals were used as refrigerants. Eventually, chlorofluorocarbons (CFCs) were developed. Decades later, scientists figured out CFCs were destroying the ozone layer. So how are chemists helping us keep cool without killing the planet? Sophia Cai explains in this week's episode of Speaking of Chemistry. Check it out here: http://youtu.be/_uSlZiD33-0. Credit Courtesy of the American Chemical Society Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.