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1 Effects of ozone layer depletion on the environment With the loss of the shield from ultraviolet radiation, serious damage can result on all living organisms. The severity of the situation is augmented by the fact that each one percent depletion of ozone results in up to two percent increased exposure to ultraviolet radiation. Time of the day Time of the year Location Elevation Reflection Weather Activity Between 10 am to 4 pm Summer or hot season Especially close to the equator and poles Altitude above sea level Sand, snow, water and ice No dark clouds in front of the sun UV factors High UV radiation Plant and marine life could be adversely affected by increased exposure to ultraviolet radiation caused by depletion of the ozone layer. The sensitive ecosystem of the oceans may be adversely affected. The phytoplankton and larvae of many species that live from the surface of the ocean down to several metres below the surface could well be sensitive to increased exposure to ultraviolet radiation. Increased exposure results in reduced productivity, which means less plant life and fewer fish harvested from the seas. The Global Solar UV Index, developed by the World Health Organization in collaboration with UNEP and the World Meteorological Organisation, is a tool to describe the level of UV radiation at the Earth’s surface. It uses a range of values from zero upwards, taking into account all the factors to indicate the potential for adverse health effects due to UV radiation. The higher the value, the greater the amount of dangerous UV rays. Fortunately there are many easy ways to protect ourselves from these dangerous rays. Use that information to write out a four point action plan. • During the hot season avoid the sun between 10 am and 4 pm when the UV Index is the highest. • Search for a shade when you’re outside. Under a tree there might be up to 60% less radiation than in a sunny place. • Cover your skin and eyes. Wear long sleeves, trousers, a hat or something to cover your head and sunglasses to protect your eyes. • Use sunscreen. If you want to go swimming, avoid the midday hours and use sunscreen for the whole body as the water reflects the rays efficiently and increases the radiation. Also while wearing a long-sleeved shirt use some sunscreen on your hands or other parts that are not covered. Sunscreen should also be used often; if you put it once and stay in the sun for hours that is not enough to well protect your skin. Also every time you go swimming you should add sunscreen afterwards. 23 Environmental ImpactPDF Image | Manual for Refrigeration Servicing Technicians
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