. . . . "2 Degree Celsius Climate Target at Risk from Ozone-Friendly Replacement Chemicals Mon, Nov 21, 2011 Keeping a global, 21st century temperature rise under 2 degrees Celsius will require urgent action on a group of chemicals increasingly being used in products such as air conditioners, refrigerators, firefighting equipment and insulation foams. | Fran??ais Photo: UNEP/GRID-Arendal Bali (Indonesia)/N" .