Biofuels is the promising source of energy for future fuel needs. Biodiesel can be established from growing plants which naturally contains oil namely Jatropha, palm oil, Soybean and algae. Bioethanol can be extracted from sugar crops like sugarcane, sugar beet, maize, corn etc by yeast fermentation. Wood products can also be converted into Biofuels.

The acquired Biofuels from these items contains both benefits and drawbacks.

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 renewable and pure fuels so it is great for autos. It reduces the green home 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 better than very first generation fuels. It uses carbon emission cost 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 lubricant.

Economical: The biofuel's price reduces significantly if the biofuel production technology spreads worldwide. The biofuels are developed locally which instantly enhances the rural development as the innovation depends mainly on manual power. The quick increase of biofuel all at once increases the production of these oil crops which promotes the farming market. The UK federal government has revealed that it minimizes the taxation for cars which are environmentally friendly. Additionally, the resilience 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 eco-friendly and more secure to manage and less hazardous than nonrenewable fuel sources.

Disadvantages of Biofuels:

Environmental Alarm: Adapting more lands for planting crops for biofuel extraction will discarded more habitats. More forests have been damaged in Asian countries for the plantation. The producing mechanism of these biodiesel undoubtedly needs fossil fuels which produces more carbon emissions. High initial financial investment is needed for the biodiesel production.

Odour: Certain biofuel crop produces heavy odor those smells are usually unwanted 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 substantial quantity of water is needed for proper yield, even for dry spell resistant jatropha curcas plants.

Availability: The biofuels are not available in surplus so the diesel engines which are modified for biodiesel use might deal with problems. The most autos are not equipped for using biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the chillier areas. It also increases the risk of microbial growth in the engine. Only couple of petrol stations offer this biofuels and it is difficult to carry the biofuels utilizing pipelines.

Carbon emission: Biofuels are reduces the Jatropha 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.