2008 ozone hole larger than in 2007 , European Space Agency says . The ESA announced its results based on information from German and Dutch researchers who analyzed satellite data . Comment: Ozone layer acts as a sunlight filter , shielding Earth from some ultraviolet rays .
2008 ozone hole larger than in 2007 , European Space Agency says . Comment: Ozone layer acts as a sunlight filter , shielding Earth from some ultraviolet rays .