Biofuels is the appealing source of energy for future fuel needs. Biodiesel can be developed from growing plants which naturally consists of oil namely jatropha curcas, 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 obtained Biofuels from these products consists of both advantages and disadvantages.

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 sustainable and pure fuels so it is great for vehicles. It reduces the green house substantially compared to other nonrenewable fuel sources.

First generation biofuels can conserve carbon emissions about 60% compared to fossil fuels whereas the 2nd generation biofuels are better than first generation fuels. It provides carbon emission savings as much as 80%. Recently, UK Government publication specified that biofuels can lower emissions by 50-60%. Efficiency of the engine increases by using biodiesel as the lubricant.

Economical: The biofuel's rate reduces substantially if the biofuel production technology spreads out worldwide. The biofuels are developed in your area which instantly boosts the rural advancement as the technology depends mainly on manual power. The quick boost of biofuel all at once increases the production of these oil crops which stimulates the farming market. The UK government has announced that it lowers the taxation for lorries which are environment-friendly. Additionally, the toughness of the engine increases while using these combustible fuels in engines.

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

Disadvantages of Biofuels:

Environmental Alarm: Adapting more lands for planting crops for biofuel extraction will got rid of 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 investment is required for the biodiesel production.

Odour: Certain biofuel crop produces heavy odor those smells are typically 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 need for these crops for biofuels may raise the cost of these food crops. The big amount of water is needed for appropriate yield, even for dry spell resistant jatropha curcas plants.

Availability: The biofuels are not readily available in surplus so the diesel engines which are customized for biodiesel use may deal with issues. The most automobiles are not equipped for using biofuels in the engines. Some biodiesel can not withstand frost; it gets frozen in the cooler areas. It likewise increases the threat of microbial growth in the engine. Only few gas stations use this biofuels and it is impossible to carry the biofuels utilizing pipelines.

Carbon emission: Biofuels are decreases the jatropha curcas 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.