Showing posts with label CC14. Show all posts
Showing posts with label CC14. Show all posts

Thursday, September 11, 2014

UN Says Ozone Layer Might Recover by 2050

The Earth's protective ozone layer may fully recover in the next few decades thanks to harmonized international action against ozone depleting substances, a new assessment by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) reads.
"There are positive indications that the ozone layer is on track to recovery towards the middle of the century. The Montreal Protocol - one of the world's most successful environmental treaties - has protected the stratospheric ozone layer and avoided enhanced UV radiation reaching the earth's surface," said UN Under-Secretary-General and UNEP Executive Director Achim Steiner in a press-statement Wednesday.

Thursday, August 21, 2014

Mysterious source of ozone-depleting chemical baffles NASA / La Nasa a détecté une substance détruisant la couche d'ozone en quantité inexpliquée

WASHINGTON: A chemical used in dry cleaning and fire extinguishers may have been phased out in recent years but NASA said Wednesday (Aug 20) that carbon tetrachloride (CCl4) is still being spewed into the atmosphere from an unknown source. The world agreed to stop using CC14 as part of the Vienna Convention on Protection of the Ozone Layer and its Montreal Protocol, which attained universal ratification in 2009.
"Parties to the Montreal Protocol reported zero new CCl4 emissions between 2007-2012," the US space agency said in a statement. "However, the new research shows worldwide emissions of CCl4 average 39 kilotons per year, approximately 30 per cent of peak emissions prior to the international treaty going into effect."

EL News