irinnews.org - DUBAI Thursday, October 09, 2008 (IRIN) - "Black cloud", a mass of polluted air which darkens the skies of the Egyptian capital in October-November, is less severe this year, but efforts to reduce the pollution that leads to this phenomenon should continue if a disaster is to be avoided, an environment official said. "Last year the cloud appeared for 20 hours [in October-November] compared with more than 100 hours in 1999. Nevertheless, efforts to combat pollution should continue, otherwise...» view full story