Ozone Hole Size
The extent of ozone depletion for any given period depends on complex interaction between chemical and climatic factors such as temperature and wind. The unusually high levels of depletion in 1988, 1993 and 2002 were due to early warming of the polar stratosphere caused by air disturbances originating in mid-latitudes, rather than by major changes in the amount of reactive chlorine and bromine in the Antarctic stratosphere.
02 Nov 2009 - by Emmanuelle Bournay, UNEP/GRID-Arendal
World ODS Banks by Sector
‘Banks’ are the total amount of substances contained in existing equipment, chemical stockpiles, foams and other products not yet released to the atmosphere or destroyed in destruction facilities.
01 Oct 2009 - by Emmanuelle Bournay, UNEP/GRID-Arendal
Clearing invasive alien plant species
Despite the widespread distribution and extent of alien invasive species in South Africa, actions to control such plants have had some good results. In the fight against invasive alien plant species, the Working for Water programme has used various methods including mechanical methods, chemical methods, biological control, and integrated control.
21 Jun 2011 - by Riccardo Pravettoni, UNEP/GRID-Arendal