DESC-INTERGOVERNMENTAL PANEL ON CLIMATE CHANGE SAY IN 2007 THAT X-Y WOULD DISAPPEAR BY YEAR DESC-20IT MUST DESC-NOT BE MANUFACTURE AND X-IT MUST DESC-NOT BE INVENT .

the intergovernmental panel on climate change said in 2007 that they would disappear by the year 20it must not be manufactured and it must not be invented .
