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

The gotten Biofuels from these items consists of both advantages 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 resources, and it is eco-friendly and pure fuels so it is excellent for autos. It lowers the green home significantly 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 much better than very first generation fuels. It provides carbon emission savings as much as 80%. Recently, UK Government publication specified that biofuels can minimize emissions by 50-60%. Efficiency of the engine increases by utilizing biodiesel as the lube.

Economical: The biofuel's price reduces significantly if the biofuel production innovation spreads out worldwide. The biofuels are developed locally which instantly enhances the rural advancement as the innovation depends primarily on manual power. The quick increase of biofuel concurrently increases the production of these oil crops which promotes the farming market. The UK federal government has announced that it reduces the taxation for automobiles which are environmentally 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 eco-friendly and it is eco-friendly and safer to handle and less dangerous 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 actually been ruined in Asian countries for the plantation. The producing mechanism of these biodiesel certainly needs nonrenewable fuel sources which produces more carbon emissions. High initial investment is needed for the biodiesel production.

Odour: Certain biofuel crop produces those smells are usually undesirable and biofuels plants can not be setup near the big 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 may raise the cost of these food crops. The big amount of water is required for proper 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 face problems. The most automobiles are not equipped for using biofuels in the engines. Some biodiesel can not withstand frost; it gets frozen in the cooler locations. It also increases the risk of microbial growth in the engine. Only few gas stations use this biofuels and it is impossible to transfer the biofuels using pipelines.

Carbon emission: Biofuels are lowers 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 laughing gas.