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...Wbsu cbcs curricula and syllabi for ug ability enhancement course aec environmental sciences credits classes unit multidisciplinary nature of science class definition scope importance need public awareness natural resources renewable non a forest use over exploitation deforestation b water utilization surface ground floods drought dams benefits problems c mineral effects extracting using d food world changes caused by agriculture overgrazing modern fertilizer pesticide logging salinity e energy growing needs sources alternate f land as resource degradation man induced landslides soil erosion desertification ecosystems concept an ecosystem producers consumers decomposers flow in the ecological succession chains webs pyramids introduction types characteristic features structure function following grassland desert aquatic ponds streams lakes rivers oceans estuaries biodiversity its conservation genetic species diversity biogeographical classification india value consumptive productive soc...