Ozone recovery?


  • Anonymous


New research indicates that levels of the ozone-depleting chemical methyl chloroform are falling, the first decrease ever measured of a substance restricted by the Montreal Protocol. The Protocol is an international treaty limiting the production of ozone-depleting chemicals. The research, led by Ronald Prinn of the Massachusetts Institute of Technology, showed that concentrations of methyl chloroform have decreased at approximately 2% per year since mid-1990. Until that time, levels had increased by approximately 4% a year since 1978.