1. Grace Sung Grade-9 Gandhi
Energy source II
Grace Sung
Grade-9 Gandhi

2. SOLAR ENERGY -converted in to electrical energy.

3. ㄴgood alternative instead fossil fuel
PROS
Environment friendly
ㄴ help to save the earth
Renewable energy source
ㄴgood alternative instead fossil fuel
Cut down electricity bill
ㄴ get from sun free
ㄴsave the money

4. CONS Photovoltaic cells Cost Efficiency
ㄴHealth problem not handling well
Cost
ㄴExpensive
Efficiency
ㄴ Absorbed the energy during the day only

5. WIND ENERGY Transferred into electrical energy using the wind turbine.

6. PROS -Green energy -Worldwide electricity production
-Good domestic potential

7. CONS No wind cannot work -Damage by wind -threat to wildlife
http;//energy informative.org/wind/energy pros and cons/

8. BIOMASS ENERGY Is organic matter from plants and animals
Energy informative .org/biomass/energy pros and cons/

9. -Low carbon PROS -Convert Waste into Energy -Abundant

10. CONS Require space Inefficient ㄴproduct Ethanol produces by biomass
ㄴBig areas for harvesting
Inefficient
ㄴproduct Ethanol produces by biomass
Energy informative .org/biomass/energy pros and cons/

11. GEOTHERMAL -Is the heat from the Earth

12. PROS
-Zero carbon -Already cost competitive on some areas. -Emission free

13. CONS Water Usage High construction cost

14. REFERENCE

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