Biofuels is the promising source of energy for future fuel requirements. Biodiesel can be developed from growing plants which naturally consists of oil namely jatropha curcas, palm oil, Soybean and algae. Bioethanol can be extracted from sugar crops like sugarcane, sugar beet, maize, corn and so on by yeast fermentation. Wood products can also be converted into Biofuels.

The obtained Biofuels from these products includes both advantages and drawbacks.

Advantages of Biofuels:

Ecological Benefits: The main expectation of utilizing the biofuel is to be carbon neutral, less of CO and Sulfur, as it is made from natural resources, and it is eco-friendly and pure fuels so it benefits cars. It minimizes the green house substantially compared to other fossil fuels.

First generation biofuels can conserve carbon emissions about 60% compared to nonrenewable fuel sources whereas the 2nd generation biofuels are much better than first generation fuels. It uses carbon emission savings as much as 80%. Recently, UK Government publication stated that biofuels can reduce emissions by 50-60%. Efficiency of the engine increases by utilizing biodiesel as the lube.

Economical: The biofuel's price decreases substantially if the biofuel production technology spreads out worldwide. The biofuels are established in your area which instantly enhances the rural development as the technology depends mainly on manual power. The rapid boost of biofuel concurrently increases the production of these oil crops which stimulates the farming market. The UK federal government has announced that it reduces the tax for automobiles which are environment-friendly. Additionally, the durability of the engine increases while utilizing these flammable fuels in engines.

Renewability and Degradable: The biofuels are made from crops which are renewable and it is biodegradable and safer to handle and less harmful than fossil fuels.

Disadvantages of Biofuels:

Environmental Alarm: Adapting more lands for planting crops for biofuel extraction will got rid of more environments. More forests have been ruined in Asian countries for the plantation. The producing system of these biodiesel undoubtedly requires fossil fuels which produces more carbon emissions. High initial financial investment is needed for the biodiesel production.

Odour: Certain biofuel crop produces heavy smell those odours are generally unfavorable and biofuels plants can not be setup near the big communities.

Food and water Requirements: Some biofuel crops such as corn oil, palm oil are edible for cooking; the need for these crops for biofuels may raise the rate of these food crops. The substantial quantity of water is needed for appropriate yield, even for dry spell resistant Jatropha plants.

Availability: The biofuels are not offered in surplus so the diesel engines which are customized for biodiesel use may deal with issues. The most autos are not equipped for using biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the cooler locations. It also increases the danger of microbial growth in the engine. Only couple of petrol stations provide this biofuels and it is difficult to transfer the biofuels utilizing pipelines.

Carbon emission: Biofuels are decreases the Jatropha greenhouse gases emission compared to other nonrenewable fuel sources. Recently, the European scientist reported that the burning of biodiesel specifically corn and rapeseed produces more laughing gas.