Biofuels is the promising source of energy for future fuel needs. Biodiesel can be established 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 transformed into Biofuels.

The obtained Biofuels from these products consists of both benefits and disadvantages.

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 deposits, and it is renewable and pure fuels so it benefits cars. It reduces the green house substantially compared to other nonrenewable fuel sources.

First generation biofuels can save carbon emissions about 60% compared to nonrenewable fuel sources whereas the second generation biofuels are much better than first generation fuels. It uses carbon emission savings as much as 80%. Recently, UK Government publication specified 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 considerably if the biofuel production technology spreads worldwide. The biofuels are developed locally which instantly enhances the rural development as the innovation depends generally on manual power. The rapid increase of biofuel all at once increases the production of these oil crops which stimulates the farming market. The UK federal government has revealed that it decreases the tax for lorries which are environmentally friendly. Additionally, the resilience 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 much safer to handle and less harmful 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 destroyed in Asian countries for the plantation. The producing mechanism of these biodiesel indeed requires nonrenewable fuel sources which produces more carbon emissions. High initial financial investment is required for the biodiesel production.

Odour: Certain biofuel crop produces heavy smell those smells are normally unwanted 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 demand for these crops for biofuels might raise the rate of these food crops. The huge amount of water is needed for appropriate yield, even for drought resistant jatropha curcas plants.

Availability: The biofuels are not offered in surplus so the diesel engines which are customized for biodiesel usage may deal with issues. The most automobiles are not geared up for utilizing biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the colder areas. It also increases the threat of microbial development in the engine. Only few petrol stations provide this biofuels and it is impossible to transfer the biofuels utilizing pipelines.

Carbon emission: Biofuels are reduces the jatropha curcas greenhouse gases emission compared to other fossil fuels. Recently, the European researcher reported that the burning of biodiesel especially corn and rapeseed produces more nitrous oxide.