Biofuels is the promising source of energy for future fuel needs. Biodiesel can be developed from growing plants which naturally contains oil specifically 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 items can also be converted into Biofuels.

The obtained Biofuels from these items consists of both advantages and downsides.

Advantages of Biofuels:

Ecological Benefits: The primary expectation of using the biofuel is to be carbon neutral, less of CO and Sulfur, as it is made from natural deposits, and it is eco-friendly and pure fuels so it benefits vehicles. It decreases the green home substantially compared to other fossil fuels.

First generation biofuels can save carbon emissions about 60% compared to fossil fuels whereas the second generation biofuels are better than very first generation fuels. It offers carbon emission cost savings up to 80%. Recently, UK Government publication mentioned that biofuels can lower emissions by 50-60%. Efficiency of the engine increases by utilizing biodiesel as the lube.

Economical: The biofuel's rate decreases significantly if the biofuel production technology spreads worldwide. The biofuels are established locally which automatically boosts the rural advancement as the technology depends primarily on manual power. The quick increase of biofuel simultaneously increases the production of these oil crops which promotes the agricultural market. The UK government has announced that it lowers the taxation for automobiles which are environmentally friendly. Additionally, the durability of the engine increases while using these flammable fuels in engines.

Renewability and Degradable: The biofuels are made from crops which are eco-friendly and it is biodegradable and more secure to manage and less dangerous than nonrenewable fuel sources.

Disadvantages of Biofuels:

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

Odour: Certain biofuel crop produces heavy odor those smells are typically unfavorable and biofuels plants can not be setup near the large communities.

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

Availability: The biofuels are not available in surplus so the diesel engines which are customized for biodiesel use might deal with problems. The most automobiles are not geared up for utilizing biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the cooler locations. It likewise increases the danger of microbial growth in the engine. Only few gas stations provide this biofuels and it is difficult to transport the biofuels utilizing pipelines.

Carbon emission: Biofuels are minimizes the Jatropha greenhouse gases emission compared to other nonrenewable fuel sources. Recently, the European scientist reported that the burning of biodiesel especially corn and rapeseed produces more nitrous oxide.