Way before ozone levels had significantly diminished over the South Pole, policy makers had already sprung to action over ozone depletion. In 1979, aerosol cans were banned to help alleviate amounts of CFCs induced into the atmosphere. However, this was only a small part of the problem. When O3 continued to become depleted, it became obvious that more was needed to be done. Finally, in 1989, over 140 countries came together to phase out CFC production. This effort, now called the Montreal Protocol, set up a fund to help switch developing nations to ozone-safe chemicals. This phase out has been successful, and since 1994 O3 depleting compounds have been decreasing in atmospheric concentration. This model of an international effort is inspirational and should be sought as a paradigm for future global concerns.