Efforts to heal the hole in earth's ozone layer over antarctica appear to be paying off, according to a new, first-of-its-kind study that looked directly at ozone- destroying chemicals in the atmosphere earth's ozone layer protects the planet's surface from some of the sun's more harmful rays that can cause. In 1989, amidst mounting scientific evidence, dozens of nations joined forces to sign a treaty aimed at halting the expansion of a massive hole in earth's ozone layer nearly thirty years later, the montreal protocol has done just that but it has also done something its architects never intended it has become. The montreal protocol on substances that deplete the ozone layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion it was agreed on 16 september 1987, and entered into force on 1 january 1989, followed by a.
Most atmospheric ozone is concentrated in a layer in the stratosphere, about 9 to 18 miles (15 to 30 km) above the earth's surface (see the figure below) ozone is a molecule that contains three oxygen atoms at any given time, ozone molecules are constantly formed and destroyed in the stratosphere.
The ozone layer or ozone shield is a region of earth's stratosphere that absorbs most of the sun's ultraviolet radiation it contains high concentrations of ozone (o 3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere the ozone layer contains less than 10 parts per. Ozone depletion essaysthe problem (intro) the poisoning of the earth's ozone layer is increasingly attracting worldwide concern for the global environment and the health effects of life on the planet earth there is not just one particular cause for the ozone's depletion the accu.