Biofuels is the promising source of energy for future fuel needs. Biodiesel can be developed from growing plants which naturally contains oil namely jatropha curcas, palm oil, Soybean and algae. Bioethanol can be drawn out from sugar crops like sugarcane, sugar beet, maize, corn etc by yeast fermentation. Wood items can also be transformed into Biofuels.

The acquired Biofuels from these items includes both benefits 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 is excellent for automobiles. It reduces 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 second generation biofuels are much better than first generation fuels. It provides carbon emission savings up to 80%. Recently, UK Government publication stated that biofuels can decrease emissions by 50-60%. Efficiency of the engine increases by utilizing biodiesel as the lube.

Economical: The biofuel's cost reduces significantly if the biofuel production innovation spreads worldwide. The biofuels are established locally which instantly boosts the rural advancement as the technology depends generally on manual power. The quick boost of biofuel simultaneously increases the production of these oil crops which stimulates the farming market. The UK federal government has announced that it decreases the taxation for lorries which are environment-friendly. Additionally, the sturdiness of the engine increases while using these combustible fuels in engines.

Renewability and Degradable: The biofuels are made from crops which are eco-friendly and it is biodegradable and much safer to manage and less harmful than fossil fuels.

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 initial investment is needed for the biodiesel production.

Odour: Certain biofuel crop produces heavy smell 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 might raise the rate of these food crops. The big amount of water is required for correct yield, even for resistant jatropha curcas plants.

Availability: The biofuels are not offered in surplus so the diesel motor which are customized for biodiesel usage might face problems. The most cars are not equipped for utilizing biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the cooler locations. It also increases the risk of microbial development in the engine. Only few petrol stations offer this biofuels and it is difficult to carry the biofuels using pipelines.

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