martes, 11 de octubre de 2016

Premio Nobel de química en el año 1995

On October 11, 1995, Mario Molina, Sherwood Rowland, and Paul Crutzen won the Nobel Prize in Chemistry for their work demonstrating that gases known as chlorofluorocarbons (CFCs) are eating away Earth's ozone layer.

People used to think that UVA light, the radiation used in tanning beds, is harmless because it doesn’t cause burns. However, scientists now know that UVA light is even more harmful than UVB, penetrating more deeply and causing a deadly skin cancer, melanoma, and premature aging. The ozone layer, our Earth’s sunscreen, absorbs about 98 percent of this devastating UV light.