SCIENCE: Satellite images show expanding vegetation in deserts Tiffany Stecker, E&E reporter Published: Monday, June 10, 2013 Higher levels of carbon dioxide in the air could be leading to greener deserts around the world, a recent study finds. Please subscribe to ClimateWire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.