Scientists say the ozone layer is recovering
Source: AP-EXCITE
By SETH BORENSTEIN
WASHINGTON (AP) — Earth's protective but fragile ozone layer is beginning to recover, largely because of the phase-out since the 1980s of certain chemicals used in refrigerants and aerosol cans, a U.N. scientific panel reported Wednesday in a rare piece of good news about the health of the planet.
Scientists said the development demonstrates that when the world comes together, it can counteract a brewing ecological crisis.
For the first time in 35 years, scientists were able to confirm a statistically significant and sustained increase in stratospheric ozone, which shields us from solar radiation that causes skin cancer, crop damage and other problems.
From 2000 to 2013, ozone levels went up 4 percent in the key mid-northern latitudes at about 30 miles high, said NASA scientist Paul A. Newman. He co-chaired the every-four-years ozone assessment by 300 scientists, released at the United Nations.
FULL story at link.
This undated handout photo provided by Centro Mario Molina shows Mario Molina in Mexico City. Earth protective but fragile ozone layer is finally starting to rebound, says a United Nations panel of scientists. Scientists hail this as rare environmental good news, demonstrating that when the world comes together it can stop a brewing ecological crisis. It's a victory for diplomacy and for science and for the fact that we were able to work together, said chemist Mario Molina. In 1974, Molina and F. Sherwood Rowland, first wrote a scientific study forecasting the ozone depletion problem. They shared the 1995 Nobel Prize for chemistry for their work. (AP Photo/Centro Mario Molina)
Read more: http://apnews.excite.com/article/20140910/us-sci--ozone_rebounds-f1824a92cd.html
= new reply since forum marked as read
Because it's worth appreciating....
In fact, to celebrate, I am gonna go ahead with the call to the landscapers I've been thinking of contacting, to have some TREES planted.
Hmmmm, I wonder how positive that would be if lots and lots of people started planting trees?
These paragraphs in the story are disturbing:
Paradoxically, heat-trapping greenhouse gases — considered the major cause of global warming — are also helping to rebuild the ozone layer, Newman said. The report said rising levels of carbon dioxide and other gases cool the upper stratosphere, and the cooler air increases the amount of ozone.
And in another worrisome trend, the chemicals that replaced CFCs contribute to global warming and are on the rise, said MIT atmospheric scientist Susan Solomon. At the moment, they don't make much of a dent, but they are expected to increase dramatically by 2050 and make "a big contribution" to global warming.
