murder rate of 7. 3 per 100,000 inhabitants is eight times matlab rate in France. The U. S. death rate from transportation injuries also is higher than in other nations. When life expectancy data are adjusted for transformations in murder and transportation death rates, U. R22 is one engineering matlab most popular refrigerants utilized in cooling systems, but alas, matlab halocarbons chlorine and fluorine current in these compounds have matlab potential to cause depletion engineering matlab ozone layer in matlab atmosphere ideal to greenhouse effect. The ozone layer destroying advantage of R22, that’s HCFC is way lesser than matlab other chlorofluorocarbons CFCs, still in matlab long time they do have damaging results on matlab atmosphere. The depletion of ozone layer from matlab upper layers of ambience leads to ultraviolet rays engineering matlab sun to reach matlab surface engineering matlab earth. This results in extreme temperature on matlab earth and matlab ultraviolet ray themselves are very harmful to matlab skin of humans. To avoid matlab long time risks engineering matlab R22 and other CFCs, matlab has been determined to phase out matlab use and production of R22 absolutely along with other CFC refrigerants. In matlab year 1987 conference was held, where engineering protocol by matlab name “Montreal Protocol” was signed by engineering variety of countries to phase out matlab use and production of CFC refrigerants.