Biofuels is the appealing source of energy for future fuel requirements. Biodiesel can be developed from growing plants which naturally contains oil particularly 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 transformed into Biofuels.

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

Advantages of Biofuels:

Ecological Benefits: The main expectation of using the biofuel is to be carbon neutral, less of CO and Sulfur, as it is made from natural resources, and it is renewable and pure fuels so it benefits vehicles. It reduces the green house significantly compared to other nonrenewable fuel sources.

First generation biofuels can conserve carbon emissions about 60% compared to nonrenewable fuel sources whereas the second generation biofuels are better than first generation fuels. It offers 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 lube.

Economical: The biofuel's price reduces considerably if the biofuel production technology spreads worldwide. The biofuels are developed locally which automatically enhances the rural advancement as the innovation depends generally on manual power. The quick increase of biofuel at the same time increases the production of these oil crops which stimulates the agricultural industry. The UK government has actually revealed that it reduces the taxation for cars which are environment-friendly. Additionally, the durability of the engine increases while utilizing these combustible fuels in engines.

Renewability and Degradable: The biofuels are made from crops which are eco-friendly and it is naturally degradable and much safer to manage and less harmful than nonrenewable fuel sources.

Disadvantages of Biofuels:

Environmental Alarm: Adapting more lands for planting crops for biofuel extraction will threw away more habitats. More forests have been ruined in Asian countries for the plantation. The producing mechanism of these biodiesel undoubtedly requires nonrenewable fuel sources which produces more carbon emissions. High initial investment is needed for the biodiesel production.

Odour: Certain biofuel crop produces heavy odor those odours are normally 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 need for these crops for biofuels might raise the cost of these food crops. The substantial quantity of water is needed for appropriate yield, even for drought resistant jatropha curcas plants.

Availability: The biofuels are not readily available in surplus so the diesel engines which are modified for biodiesel use may deal with problems. The most automobiles are not geared up for utilizing biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the cooler areas. It likewise increases the risk of microbial growth in the engine. Only few gas stations provide this biofuels and it is impossible to transport the biofuels using 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 especially corn and rapeseed produces more nitrous oxide.