Dr Sherwood Rowland, who won a Nobel Prize for his studies of atmosphericozone, said the consensus of scientific opinion on climate change was being ignored.
Already, atmospheric scientists have detected reductions in atmospheric concentrations of a number of ozone depleting chemicals, a positive sign that the 1985 Montreal Protocol to reduce Cfc emissions is working.
From 1986 to 1987 David worked as research student at Oxford University's Department of Atmospheric Physics, specifically working on the ozone hole and global warming.
"Unfortunately, it's going to be several decades before we see the end of the Antarctic ozone hole, " said Dr Susan Solomon of the United States National Oceanic and Atmospheric Administration.