Biofuels is the appealing source of energy for future fuel requirements. Biodiesel can be established from growing plants which naturally consists of 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 converted into Biofuels.

The obtained Biofuels from these products consists of both advantages and drawbacks.

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 deposits, and it is renewable and pure fuels so it is excellent for cars. 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 second generation biofuels are much better than first generation fuels. It offers carbon emission savings up to 80%. Recently, UK Government publication mentioned that biofuels can reduce emissions by 50-60%. Efficiency of the engine increases by utilizing biodiesel as the lube.

Economical: The biofuel's cost reduces significantly if the biofuel production technology spreads worldwide. The biofuels are developed locally which instantly boosts the rural advancement as the innovation depends generally on manual power. The rapid boost of biofuel all at once increases the production of these oil crops which promotes the agricultural industry. The UK federal government has actually announced that it reduces the taxation for automobiles which are environment-friendly. Additionally, the toughness of the engine increases while utilizing these combustible fuels in engines.

Renewability and Degradable: The biofuels are made from crops which are renewable and it is eco-friendly and more secure to manage 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 destroyed in Asian nations for the plantation. The producing system of these biodiesel undoubtedly requires fossil fuels which produces more carbon emissions. High preliminary financial investment is needed for the biodiesel production.

Odour: Certain biofuel crop produces heavy odor those odours are normally undesirable and biofuels plants can not be setup near the large 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 might raise the rate of these food crops. The big amount of water is required for appropriate yield, even for dry spell resistant jatropha curcas plants.

Availability: The biofuels are not available in surplus so the diesel motor which are customized for biodiesel use may face problems. The most cars are not equipped for using biofuels in the engines. Some biodiesel can not resist frost; it gets frozen in the cooler locations. It likewise increases the risk of microbial growth in the engine. Only few gas stations provide this biofuels and it is difficult to transport the biofuels using pipelines.

Carbon emission: Biofuels are minimizes the Jatropha greenhouse gases emission compared to other nonrenewable fuel sources. Recently, the European researcher reported that the burning of biodiesel especially corn and rapeseed produces more nitrous oxide.