Energy obtained from the source of energy is natural. Alternative and renewable sources of energy are included in the activities of production conventional and for the recovery and reuse of energy sometime it would be wasted. Demand for energy development, and can have benefits to society with energy conservation and efficiency measures for energy development that can have a benefit which caused environmental issues. Transportation energy for society use of, manufacturing, illumination heating, and air conditioning, and communication, for industrial commercial and domestic purposes and the Reliant Energy Reviews  Its original forms are substantially used in the resource that can be used as energy resources that may be classified as primary resources, where the resource can be used or in the secondary resources when the energy sources must be conveniently and converted into a usable form. Significant for human use is a non-renewable resource. An ongoing process which produced renewable energy which makes human to sustain exploitation.

Resources classification

Energy resources are classified as primary resources and secondary resources to another form of conversation without end and it to another form of secondary conversation required substantial conversation. Based on energy sources classification and it required to regenerate renewable resource are those are required for the capacity which is needed for the human. Non-renewable resources those that are significantly depleted potential for during a human lifetime. One of the primary sources is a fossil fuel is a non-renewable fossil that is burning coal or hydrocarbon fuel which are the remains of plant decomposition and animals.

• Coal,
• Petroleum
• Natural gas

These are the three main types of fossil fuel LPG it means liquid petroleum and gas are another from fossil fuel is used either direct space heating and process heating and which is converted to mechanical energy for vehicles, as the industrial processes, or electrical power generation are part of the carbon cycle and thus allow to store solar energy. 18th and 19th centuries use fossil fuel at the stage of the industrial revolution. In 2005, 81% of the world’s energy needs were met from fossil sources from primary energy. The infrastructure and technology already exist for the use of fossil fuels. Petroleum delivers a great deal of usable energy per unit and weight or volume and energy density are advantages for lower energy density sources as battery currently economical for decentralization energy use. Energy security was created by fossil fuel energy dependence on imported fuel to countries. Oil dependence in particular war, funding radicals monopolization and sociology political instability and it exhausted the processes that created fossil fuels are consumed quickly are ongoing fuel

Nuclear fission

To generate useful heat and electricity nuclear power is the use of nuclear fission. All economically significant nuclear power is to produce uranium produces of fission. Radioisotope Thermos electric generators are component is a very small energy generation deep space vehicle are specialized application. Naval reactor and Nuclear power plants provided 5.7% of the world’s energy and 13% of the electricity in the world in 2012. Nuclear power reactors in 31 countries although not every reactor is producing electricity. A naval vessel using approximately 140 nuclear propulsion in operation powered reaction excluding natural fusion power sources such as the sun, physical and engineering research are the remains an ongoing area of international.