One of the most prominent and promising renewable energy Biofuels can be converted directly to the liquid fuels. Biofuels is widely used for the transportation. There are various types of Biofuels such as Ethanol, Biodiesel, Bioalcohols, Green Diesel, and Biofuel gasoline, Vegetable Oil, Bioethers, Biogas, Syngas and Solid Biomass Fuels. Ethanol and Biodiesel are the commonly used biofuels. The main aim for introducing Biofuels was to replace Gasoline, Diesel Fuel and Coal. Green Diesel, Biogas. It is having enormous advantage when compared with the fossil fuels such as less greenhouse gases providing greater fuel securities. The use of Biofuel is widely dependent on the land availability. It is made from biological agents such as plant oils or animal through the set of chemical reactions. One of the major advantages for using the Biofuel is that they are renewable energy and don not lead to global warming unlike the fossil fuels. According to few facts, Biofuels is the only renewable energy which can replace the fossil fuels.

One of the most prominent and promising renewable energy Biofuels can be converted directly to the liquid fuels. Biofuels is widely used for the transportation. There are various types of Biofuels such as Ethanol, Biodiesel, Bioalcohols, Green Diesel, and Biofuel gasoline, Vegetable Oil, Bioethers, Biogas, Syngas and Solid Biomass Fuels. Ethanol and Biodiesel are the commonly used biofuels. The main aim for introducing Biofuels was to replace Gasoline, Diesel Fuel and Coal. Green Diesel, Biogas. It is having enormous advantage when compared with the fossil fuels such as less greenhouse gases providing greater fuel securities. The use of Biofuel is widely dependent on the land availability. It is made from biological agents such as plant oils or animal through the set of chemical reactions. One of the major advantages for using the Biofuel is that they are renewable energy and don not lead to global warming unlike the fossil fuels. According to few facts, Biofuels is the only renewable energy which can replace the fossil fuels.

1. Advanced Biofuels
2. Bio refineries
3. Bio alcohols and Bioethanol
4. Bio char
5. Bio hydrogen
6. Biofuels in Transport and Renewable Heat
7. Solid biomass

It is a process used to treat contaminated media like water, soil and subsurface material, by altering environmental conditions to stimulate growth of microorganisms and degrade the target pollutants. For bioremediation process those organisms are used known as bioremediators, are most often bacteria, archaea and fungi due to their rapid growth rate, variable metabolic needs and ability to be genetically manipulated. Bioremediation has been successfully used to clean up pollutants including crude oil, gasoline, pesticides, sewage, and chlorinated solvents used in cleaning supplies. The benefits of bioremediation include lower costs and less interruption of the environment when compared to other clean up methods. Biological treatment is a similar approach used to treat wastes including wastewater, industrial waste and solid waste and other related processes.

1. In-situ bioremediation
2. Ex-situ bioremediation
3. Phytoremediation
4. Biodegradation
5. Mycoremediation
6. Microbial bioremediation
7. Bio venting

A substance that is converted by process into usable energy then the substance is called source of energy. One of the beneficial factors for the use of the Energy is that it is naturally generated. These sources are constantly replenished such as sunlight, wind, heat and water. The common energy sources are Biomass, Biofuels, Wind, Geothermal and Solar Energy. Renewable energy is energy that is collected from natural sources that replenish themselves over short periods of time, renewable energy resources exist over wide geographical areas. Rapid deployment of renewable energy and energy efficiency is resulting in significant energy security, climate change mitigation, and economic benefits.

Supportable Advancement is the dealing with a rule for meeting human change targets while meanwhile dealing with the limit of basic structures to give the ordinary resources and natural framework organizations whereupon the economy and society depend. Reasonable vitality is spotless and can be used over a drawn out stretch of time. Not in any manner like oil subordinates and biofuels that give the weight of the universes essentialness, practical power sources like hydroelectric, sun fueled and wind has imperativeness conveyed far less contamination. Sun based vitality is for the most part used on open halting meters, street lights and the highest point of structures.

1. Clean and water sanitation
2. Affordable and clean energy
3. Economic growth
4. Sustainable cities and communities

Waste-to-energy or energy-from-waste is that the one of the way of generating energy within the type of electricity and heat, from the first treatment of waste, through this the un-useful amount of energy can be considerably utilized. Waste-to-energy may be a type of energy recovery process .Now a days, Most Waste-to-Energy proceeding manufacture electricity and/or heat directly through combustion, or manufacture flammable fuel goods, like gas, alcohol or artificial fuels, methanol. For new processes like the Ebara fluidization, direct smelting method and also the Thermo- select -JFE and melting technology process for waste to energy process there are vast amount of thermal treatment plants victimized. Waste to energy technology includes aging, which may take biomass and make liquor, exploitation squander plastic or natural material. Inside the aging technique, the sugar inside the waste is changed to nursery outflow and the liquor, inside the similar and general strategy, that is wont to assemble wine. Esterification is also should be possible exploitation waste to vitality innovations, and more, the consequences of this technique are biodiesel. The esteem adequacy of esterification can depend on the feedstock being utilized and each one the inverse important variables like transportation remove, amount of oil blessing inside the feedstock can be improved in the waste to energy process.

1. Incineration
2. Gasification
3. Thermal depolymerisation
4. Pyrolysis
5. Plasma arc gasification

Concentrations on protecting the environment by reducing waste and pollution discipline that takes from broad scientific topics like chemistry, biology, ecology, geology, hydraulics, hydrology, microbiology, and mathematics to create solutions that will protect and also improves the health of living organisms and improve the quality of the environment. To keep our environment clean we will survive in healthy. Environmental engineering is a professional engineering Environmental engineering is a sub-discipline of civil engineering and chemical engineering to the study of the environment, and the solution of environmental problems.

1. Biology
2. Ecology

Renewable energy is the energy that is collected from natural sources that replenish themselves over short periods of time, renewable energy resources exist over wide geographical areas. Rapid deployment of renewable energy and energy efficiency is resulting in significant energy security, climate change mitigation, and economic benefits. While many renewable energy projects are large-scale, renewable technologies are also suited to rural and remote areas and developing countries, where energy is often crucial in human development.

Energy and environment deal with the technological and scientific aspects of energy and environment questions including energy protection, and the interaction of energy forms and systems with the physical environment, are enclosed, including the relationship of such questions to wider economic and socio-political issues. Environmental engineers work to increase recycling, waste disposal, public health, and water and air pollution control.

Biopower is literally having power over bodies; it is "an explosion of numerous and diverse techniques for achieving the subjugation of bodies and the control of populations". Biopower system technologies include direct-firing, coifing, gasification, and pyrolysis.

1. Combined heat and power
2. Energy Efficiency
3. Green Electricity
4. Thermal energy storage