Biofuels is the appealing source of energy for future fuel requirements. Biodiesel can be developed from growing plants which naturally consists of oil specifically Jatropha, 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 items includes both advantages and drawbacks.

Advantages of Biofuels:

Ecological Benefits: The primary 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 eco-friendly and pure fuels so it is great for automobiles. It minimizes the green house significantly compared to other nonrenewable fuel sources.

First generation biofuels can save carbon emissions about 60% compared to nonrenewable fuel sources whereas the 2nd generation biofuels are much better than very first generation fuels. It offers carbon emission cost savings approximately 80%. Recently, UK Government publication mentioned that biofuels can lower emissions by 50-60%. Efficiency of the engine increases by utilizing biodiesel as the lubricant.

Economical: The biofuel's price reduces considerably if the biofuel production technology spreads worldwide. The biofuels are developed locally which automatically improves the rural advancement as the innovation depends generally on manual power. The rapid increase of biofuel simultaneously increases the production of these oil crops which promotes the agricultural market. The UK government has announced that it minimizes the taxation for lorries which are eco-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 naturally degradable and much safer to deal with and less dangerous than nonrenewable fuel sources.

Disadvantages of Biofuels:

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

Odour: Certain biofuel crop produces heavy smell those odours are usually undesirable and biofuels plants can not be setup near the big neighborhoods.

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 price of these food crops. The big 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 use may deal with problems. The most automobiles are not equipped for utilizing biofuels in the engines. Some biodiesel can not withstand frost; it gets frozen in the colder locations. It likewise increases the threat of microbial development in the engine. Only few fuel stations provide this biofuels and it is difficult to transfer the biofuels utilizing pipelines.

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