The ozone layer over the Arctic has developed a huge hole this winter. That means there's less protection from the sun's dangerous ultraviolet rays. But in the long-term scientists say they are optimistic. The ozone layer is gradually recovering.
Scientists at NASA have shared evidence proving that levels of ozone-destroying chemicals in the atmosphere are declining. For the first time, there is full scientific proof that a worldwide ban on CFCs is working.
The hole in the ozone layer over the Antarctic has begun to shrink, signaling good news for the environment, researchers say. The study attributes the development on the phasing out of CFC pollutants.
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