OZONE LAYER o Ozone layer is made up
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OZONE LAYER o Ozone layer is made up from ozone molecule. o An ozone molecules is made up of three oxygen atom bound together. o Its located 19 -48 km above the Earth’s surface. o The function – serves as a shield from the Sun’s harmful energy and absorb the ultraviolet (UV) radiation that enters the atmosphere. o Now a days…. human activities had destroy the ozone layer.
HOW THE OZONE LAYER HAD BEEN DESTROY? ? • • • The ozone layer had been destroy by the chemical substance – CFCs (chlorofluorocarbon) CFCs was uses in many household item (aerosol), and electrical item (refrigerator and air-conditioner). Than the CFCs was released to the atmosphere and mix with the normal atmospheric gases at reach the stratosphere. CFCs will react with the ultraviolet light and released chlorine atoms. This chlorine atoms will damage the ozone layer. One chlorine atom can destroy 100 000 ozone molecules. Ultraviolet light CFC CFC Chlorine atoms CFCs react with ultraviolet light, Released the chlorine atoms Chlorine atoms will destroy the ozone layer
Ozone layer- been destroy by human activities
EFFECTS OF OZONE DEPLETION A THINNER OZONE LAYER LEAD TO INCREASED ULTRAVIOLET RADIATION AT THE EARTH’S SURFACE…. what will happen next? ? ? Ø Ø Ø Mutation Skin cancer Eye’s cataract Low immunity Impair tree growth Kill the phytoplankton PHYTOPLANKTON EYE’S CATARACT
The general retreat of mountain glaciers during the past century is one example of evidence that the climate is changing. 1928 South Cascade Glacier, Washington 1979 South Cascade Glacier, Washington 2003 South Cascade Glacier, Washington
