Bio fuel
Any solid, liquid, or gaseous fuel produced from organic (once living) matter, either directly from vegetation or indirectly from manufacturing, commercial, household, or agricultural wastes. There are a number of main methods for the development of bio fuels: the burning of dried out organic wastes (such as residential refuse, industrial and agricultural wastes, straw, wood, and peat); the fermentation of wet wastes (such as animal dung) in the absence of oxygen to produce bio gas (containing up to 60% methane), or the fermentation of sugar cane or maize to produce alcohol and ester; and energy forestry (producing fast-growing forest for fuel).
Fermentation produces two main types of bio fuels: alcohol and ester. These could in theory be used in place of fossil fuels but, because major alterations to engines would be required, bio fuels are usually mixed with fossil fuels. The EU allows 5% ethanol, derived from wheat, beet, potatoes, or maize, to be added to fossil fuels. In Brazil ethanol from sugar cane is used in cars run either on ethanol, on gasohol (a blend of petrol and ethanol), or on both ("dual fuel"" engines). Ethanol replaces 40% of the petrol that the world would use for motor transport.
Bio diesel
This is produced from alternative energy resources such as sugar beet, rape seed, palm oil and sunflower. It is a organic substitute for common diesel. Bio diesel is more environmentally friendly than conventional cars which run on petrol and diesel for many reasons; it is not toxic and doesn't produce as much damaging exhaust emissions. Even though bio diesel produces carbon dioxide as a by-product, the plants grown to generate the fuel absorb carbon dioxide from the atmosphere during photosynthesis. This means that the net carbon emission into the atmosphere is much less than non bio fuels such as petrol. Although there is a danger of deforestation in rainforests to create space for plantations needed to create bio diesel. Bio diesel is not available at all gasoline stations but can usually be purchased for less than the price of diesel and unleaded petrol. You could even get free bio diesel if you collect old oil from eating houses and filter it personally.
Bio ethanol
This is a biological petroleum substitute for petroleum and is made from environment friendly energy sources. It has much the very same benefits as bio diesel but is considerably common, Its popularity as a bio product is increasing however.
