- Ethanol and Bio Diesel
E.g. From Sugar Canes via fermentation.
Pro - Some CO2 is captured and 'reused'.
Pro - Reduces the demand for fossil fuel.
Con - More expensive than fossil fuels.
Con - Plants are fragile.
Con - Ridiculous land needed to provide the amount of fuel required.
- LPG - Liquefied Petroleum Gas
60% Propane, 40% Butane
Pro - Less CO, NO, and unburnt fuels.
Pro - Cheaper as compared with common fossil fuels.
Con - Difficult to store.
Con - Greater evaporative emissions.
- Hydrogen
Can be consumed in two ways:
1- Via burning: Like common fossil fuels, producing some NOx and water.
2- Via fuel cells: taking place in a cell rather than an engine, producing pure electricity.
Pro - Little or no pollution.
Pro - Semi infinite source of energy.
Con - Difficult to manufacture and store.
*Can be obtained from water via electrolysis.
- Nuclear Energy
Produced via the breaking down of unstable nuclei.
Pro - Long life span.
Con - Expensive and difficult to build and manufacture.
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