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6HYQ-9357-UFY9-9UFC-ERLD
Contents   Definition of energy   Sources of energy   Why use of fossil fuel?   Why is there a need for alternative so...
Definition of energyEnergy can b define in different manners some of them  are as follows Energy cannot be created nor de...
Sources of energysources of energy are divided in two parts.Non renewable sources                          Renewable sourc...
Why use of fossil fuel? Very high calorific value Easy to locate with advance technology. Coal is a fossil fuel that is...
Why is there a need for alternativesources of energy? 90 per cent of the worlds energy supply’s come from fossil    fuels...
Alternative source of energy   Definition• An energy source that can be used instead of fossil fuels . It is usually a ren...
Renewable sources of energy  Some of renewable(alternate) sources of energy are: Sunlight Wind Rain Tides Geothermal ...
Biomass Biomass, as a renewable energy source, is biological material from living, or recently living organisms. As an ene...
Hydropower Hydropower, or water power is power that is derived from the force or energy of falling water, which may be ha...
Geothermal heat & power Geothermal energy originates from the heat retained within the Earth since the original formation...
Sunlight , Wind , Rain , Tides These are the major alternate sources of energy.  With the help of al these we can genera...
Advantages of using naturalsources of energy They are inexhaustible – they will always be available    – they are renewab...
References http://www.wri.org http://www.google.com.pk www.ecology.com/2011 energy.usgs.gov/
Alternative sources of energy
Alternative sources of energy
Alternative sources of energy
Alternative sources of energy
Alternative sources of energy
Alternative sources of energy
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  1. 1. 6HYQ-9357-UFY9-9UFC-ERLD
  2. 2. Contents Definition of energy Sources of energy Why use of fossil fuel? Why is there a need for alternative sources of energy? Alternative source of energy Renewable sources of energy Biomass Hydropower Geothermal heat & power Sunlight , Wind , Rain , Tides Advantages of using natural sources of energy References
  3. 3. Definition of energyEnergy can b define in different manners some of them are as follows Energy cannot be created nor destroyed . Energy is the ability to do work.  The capacity for vigorous activity . An adequate or abundant amount of such power  .
  4. 4. Sources of energysources of energy are divided in two parts.Non renewable sources Renewable sources A non-renewable resource is a  Renewable source - Renewable source natural resource which cannot be is natural source which does not have a produced, grown, generated, or used on limited supply. Renewable energy can be a scale which can sustain its used again and again, and will never run consumption rate, once depleted there out. is no more available for future needs.       Examples Also considered non-renewable are  Biomass resources that are consumed much  Hydro faster than nature can create them.  Geothermal Examples  Solar• Fossil fuels (such as coal, petroleum, and natural gas)  Tidal• nuclear power (uranium)  Wave• aquifers are examples. In contrast,  Wind resources such as timber (when harvested sustainably) or metals (which can be recycled) .
  5. 5. Why use of fossil fuel? Very high calorific value Easy to locate with advance technology. Coal is a fossil fuel that is found in abundance. Transportation of fossil fuels are easy. Construction of power plants that work on fossil fuels is also easy. Petroleum is the most used form of fossil fuels for all types of vehicles. Extraction is easy with cheap cost
  6. 6. Why is there a need for alternativesources of energy? 90 per cent of the worlds energy supply’s come from fossil fuels. Stopping of fossil fuels becoming rare. Burning fossil fuels has increased atmospheric pollution. Vehicle exhausts contribute to acid rain more so than power stations burning coal. The carbon stored in fossil fuels is released as carbon dioxide when they are burnt – this leads to the green house effect and global warming Don’t get this confused with the hole in the ozone layer – this was caused by CFC’s
  7. 7. Alternative source of energy Definition• An energy source that can be used instead of fossil fuels . It is usually a renewable source of energy that could be used when fossil fuels run out.
  8. 8. Renewable sources of energy Some of renewable(alternate) sources of energy are: Sunlight Wind Rain Tides Geothermal heat Hydro Biomass
  9. 9. Biomass Biomass, as a renewable energy source, is biological material from living, or recently living organisms. As an energy source, biomass can either be used directly, or converted into other energy products such  as biofuel.Biomass gasification.Biomass heating system.Biomass fuel.
  10. 10. Hydropower Hydropower, or water power is power that is derived from the force or energy of falling water, which may be harnessed for useful purposes. Generation of electricity. Generation on large scale. Cost of generation will b low.
  11. 11. Geothermal heat & power Geothermal energy originates from the heat retained within the Earth since the original formation of the planet, from radioactive decay of minerals, and from solar energy absorbed at the surface. Geothermal heat is used for heating application.Geothermal power is used to generate electricity.
  12. 12. Sunlight , Wind , Rain , Tides These are the major alternate sources of energy. With the help of al these we can generate electricity by using solar system , generators, and by dams. We can also generate heat by sunlight by using heating system and can also generate any type of mechanical energy with these sources.
  13. 13. Advantages of using naturalsources of energy They are inexhaustible – they will always be available – they are renewable They are clean and will not damage the Earth There are several types – so one or more of them is present in each country Most natural sources can be used on a small scale and serve local needs therefore cutting costs of transmitting the energy It just require a one time big investment.
  14. 14. References http://www.wri.org http://www.google.com.pk www.ecology.com/2011 energy.usgs.gov/
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