The Earth's Ozone Layer Recovery

The Earth's ozone layer recovery reports that will take decade before the hole starts to shrink.

Scientist study that the recovery is entirely to the determination of phase out of man-made since 1980 CFC gases destroying ozone.

They also said the development demonstrates that the world comes together.

For the first time in almost 35 years, scientist were able to confirm a statistically significant and sustained increase in stratospheric ozone.

From 2000 to 2013, ozone levels climbed 4 percent in the key mid-northern latitudes at about 30 miles up, said NASA scientist Paul A. Newman. He co-chaired the every-four-years ozone assessment by 300 scientists, released at the United Nations.

The ozone layer, located in Earth's stratosphere miles above the ground, shields the planet from much of the sun's damaging ultraviolet radiation. In the 1970s, researchers realized that gases such as chlorofluorocarbons (CFCs) and halons — which were commonly used in appliances such as refrigerators, spray cans, insulation foam and fire suppressants — led to the depletion of the ozone layer, NOAA researchers said. In 1985, the scientific community found a seasonal "ozone hole" over Antarctica, and spurred action to prevent its growth.

The new report also highlights the intricate links between the ozone layer's recovery and climate change, Ravishankara said. For instance, some chemicals that have replaced ozone-depleting substances are still potent greenhouse gases, which contribute to global warming.