Tuesday, 6 November 2012

Biofuels

Biofuels are positive alternatives to fossil fuels. They are obtained from living organisms or organisms that have recently died. Wood and dried animal droppings have been used as fuels for hundreds of years.

  • Ethanol is made by processing wheat, sugar cane or sugar beet. Ethanol can be mixed with petrol to be used in car engines as fuel. Helps reduce the demand for petrol and in turn saves crude oil supplies.
Advantages
  • Biofuels are a renewable resource
  • Reduce the amount of Carbon Dioxide human activity puts into the air
Disadvantages
  • Lots of crops to grow biofuel. Lots of farmland used for biofuels instead of food
  • Excess land with trees may be burnt down to make space for biofuel farms.

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