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

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

Economical: The biofuel's rate decreases substantially if the biofuel production technology spreads out worldwide. The biofuels are established locally which immediately enhances the rural development as the innovation depends generally on manual power. The quick boost of biofuel at the same time increases the production of these oil crops which promotes the farming market. The UK government has announced that it reduces the tax for automobiles which are eco-friendly. Additionally, the durability of the engine increases while using these combustible fuels in engines.

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

Disadvantages of Biofuels:

Environmental Alarm: Adapting more lands for planting crops for biofuel extraction will threw away more habitats. More forests have been damaged in Asian countries for the plantation. The producing system of these biodiesel certainly needs fossil fuels which produces more carbon emissions. High preliminary investment is required for the biodiesel production.

Odour: Certain biofuel crop produces heavy odor those odours are generally 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 demand for these crops for biofuels may raise the cost of these food crops. The substantial quantity of water is required for appropriate yield, even for drought resistant Jatropha plants.

Availability: The biofuels are not available in surplus so the diesel engines which are customized for biodiesel use may face issues. The most cars are not equipped for utilizing biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the chillier areas. It also increases the risk of microbial development in the engine. Only few fuel stations use this biofuels and it is impossible to transport the biofuels using pipelines.

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