Four new man-made compounds that deplete our ozone layer have been discovered – three chlorofluorocarbons (CFC) and one hydrochlorofluorocarbon (HCFC). All four trace back to the 1960s, and two of the compounds continue to accumulate in our atmosphere. Their source is unidentified: We don't know where the new gases are being emitted from and this should be investigated. Of the … [Read more...]