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...U g i year semester b sc a com cbcs environmental studies aecc hrs week credits hours unit ecosystem biodiversity natural resources definition scope importance of structure abiotic biotic components producers consumers decomposers food chains webs ecological pyramids function an energy flow in the single channel model genetic species diversity hot spots threats to conservation insitu exsitu renewable non brief account forest mineral solar geothermal water rain harvesting watershed management ii pollution global issues legislation causes effects control measures air solid waste warming ozone layer depletion ill fire works disaster floods earthquakes cyclones wild life protection act c d human rights women and child welfare role information technology environment health field study pond references from crisis cure by r rajagopalan third edition oxford university press text book for undergraduate courses second erach bharucha dr k asthana meera...