03-01-2011, 02:47 PM
[attachment=7910]
BY
KANNAN.P
contents
Types of sources
Solar power
Hydro power
Wind power
Biomass
Solar-hydrogen
Geothermal
sustainable energy
conclusion
Renewable Energy Resources!
Biomass
Hydroelectric power
Geothermal
Solar—passive and active
Wind generation
Hydrogen power
Producing Electricity from Moving Water
Large-scale hydropower
Small-scale hydropower
50% of West Coast electricity
7% of US electricity
20% of World’s electricity
Major environmental impacts
High construction costs
Impacts of hydropower on salmon and other riverine spp.
Pollution
Disruption of water flow
Loss of biodiversity
Invasive species
Impacts of hydropower on Species and People
Dams can provide many human benefits but:
Disrupts ecological services rivers provide; e.g. 119 dams on Columbia River have caused a 94% drop in wild salmon; removing hydroelectric dams will restore native spawning grounds
Displaces millions of people worldwide as reservoirs flood traditional homelands
No room for expansion in the US
conclusion
Thus we see about the renewable energy sources , it’s types , applications , merits and demerits
