Ozone is a gas naturally present in the atmosphere, but in very low quantities. It is colorless and has a very strong odor that gave it its name (from Greek ozein, odor). About 90% of the atmospheric ozone is located in the stratosphere (region between an altitude of about 10 and 50 km) and comprises what one calls the ozone layer. It absorbs a large part of ultraviolent rays which are very dangerous in heavy doses, and thus protects life on Earth. (1) The protective ozone layer must not be confused with the ozone present at low altitude (in the troposphere) and linked to urban pollution. It is only loosely linked to stratospheric ozone. Gases due to pollution can not plug up the hole in the ozone layer. The hole in the ozone layer
25/10/2012
Ozone hole over Antarctic 2nd smallest in two decades
02/08/2012
Hong Kong chokes under 'worst' air pollution
09/02/2009
La fin des CFC au Zimbabwe
UNEP
Multiple Benefits Include Improved Air Quality and Human Health, Higher Crop Yields, Reduced Rate of Climate Change in the...
Designed to recognize grassroots environmental heroes, the Goldman Environmental Prize, founded by Richard and Rhoda Goldman in 1989 In San Francisco, is awarded annually to individuals from the six inhabited continental regions for sustained and significant efforts to...
In 2004 in Ethiopia, a women's education program was led by the Red Cross International Committee (Comité...
Ecological footprint
