Environment

© Sriram Rajendran, G S S Jain Vidyalaya Environment refers to the surroundings of an organisms in which they live and interact.  Thus it includes both natural and humanmade system. © Sriram Rajendran, G S S Jain Vidyalaya The sun is the important source of energy on the earth.  Only a small fraction of the sun is the total output reaches the earth.  Of this 35% is reflected back to space, 14% is absorbed by the atmosphere and the remaining 51% reaches the earth’s surface.  It is called Insolation. © Sriram Rajendran, G S S Jain Vidyalaya Environmental degradation thus, refers to the deterioration of the environment both in terms of quantity and quality.  Thus, exhaustion of certain minerals takes place. © Sriram Rajendran, G S S Jain VidyalayaResource Depletion © Sriram Rajendran, G S S Jain Vidyalaya All our economic activities are dependent on resource use.  If natural resource are misused or over used, they may not be available in future.  Non-renewable resource such as mineral oil and coal once exhausted cannot be replenished. © Sriram Rajendran, G S S Jain VidyalayaEnvironmental pollution © Sriram Rajendran, G S S Jain Vidyalaya Due to burning of fossil fuels and cloro-flurocarbons, the ozone layer in the upper atmosphere is depleting fast.  It allows more incoming of harmful ultraviolet radiations from the sun reaches the earth’s surface treating to increase the skin caner and eye damage in humans. © Sriram Rajendran, G S S Jain VidyalayaEnvironmental degradation by mining © Sriram Rajendran, G S S Jain Vidyalaya Mineral and most of the non-renewable resource.  Once mined and deposits disappear for ever.  As the society moves towards high level of industrialization the per head consumption of mineral also increase.  Thus, by using mineral our energy resources raise at high rates. © Sriram Rajendran, G S S Jain VidyalayaFertilizers and Pesticides as pollutants to environment © Sriram Rajendran, G S S Jain Vidyalaya Fertilizers and pesticides are used for increasing agricultural productivity all over the world.  These chemical constitute a very serious aspect of land pollution, substances such as DDT are used as pesticides enters the natural cycle and eco-system.  It moves through food to humans &animals and affects their health. © Sriram Rajendran, G S S Jain Vidyalaya According to the international union of conservation of nature………. 7. Thousands of birds and mammals are facing the threat of extension. 8. It’s mainly because of humans who directly or indirectly affect the wild resources. 9. Birds and animals are killed by humans for various purposes. 10. For example: monkeys are used for variety of medical experiments, whales for oil and elephants for it’s ivory. © Sriram Rajendran, G S S Jain Vidyalaya© Sriram Rajendran, G S S Jain Vidyalaya