Most of us associate increasing greenhouse gas emissions with climate change. But a group of scientists writing in the journal Nature say greenhouse gases are affecting the earth’s protective stratospheric ozone layer as well. Lead author Drew Shindell (shin-DELL) is a scientist at the NASA Goddard Institute for Space Studies. He told Steve Curwood that thanks to rising emissions of carbon dioxide and other climate-changing gases, the ozone layer will stay depleted longer than previously anticipated.