1 | Climate change is bringing mixed news to the ozone layer. | |
2 | Climate change and the depleted ozone layer are among the starkest examples. | |
3 | The size and shape of the ozone hole is shown in 2009. | |
4 | "Nitrogen oxides in particular are of concern, " he says, because they can destroy ozone. | |
5 | Scientists thought large, wholly natural, year-to-year variations in Antarctic ozone would obscure any small upward trend. |