Showing posts with label ozone. Show all posts
Showing posts with label ozone. Show all posts
Wednesday, March 16, 2016
More cars banned in Mexico City after pollution alert
Ετικέτες
alert,
carbon emissions,
cities,
health,
Mexico,
ozone,
Polluting vehicles,
pollution
Thursday, December 17, 2015
Tuesday, September 16, 2014
Marking International Day, UN officials hail progress in reducing damage to ozone layer
UN, 16 September 2014 – United Nations officials today hailed the progress made in reducing damage to the ozone layer and the vital role played by one of the most successful environmental treaties in history in phasing out ozone-depleting substances.
“Just over a quarter-century ago, the world united to reverse the rapid depletion of the atmospheric ozone layer, which protects Earth from harmful radiation from space. Today, the ozone layer is well on track to recovery within the next few decades,” Secretary-General Ban Ki-moon said in his message for the International Day for the Preservation of the Ozone Layer.
“Just over a quarter-century ago, the world united to reverse the rapid depletion of the atmospheric ozone layer, which protects Earth from harmful radiation from space. Today, the ozone layer is well on track to recovery within the next few decades,” Secretary-General Ban Ki-moon said in his message for the International Day for the Preservation of the Ozone Layer.
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.
"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."
"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."
Ετικέτες
Atmosphere,
CC14,
la couche d'ozone,
NASA,
ozone
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