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Paper long abstract:

The demand for energy supply has been increasing drammatically in recent years in our developed world. Additionally, due to the uncertain economic structure of the country, energy has a chaotic and nonlinear trend. In this paper, the usage of types of energy will be evaluated. Despite its importance in science and engineering, available definitions of energy so far only comment on its use, e.g. regarding the supply of work or heat, but don’t have a real explanation of what energy is, nor why it is conserved. This paper strugles to give brief explanation in regard with energy. To understand what energy is, the conservation of energy is of central importance. It is evident that numerous forms of energy (heat, light, motion, electrical, chemical, gravitational energy ) can be found in the globe. On the whole, it obvious that there are considerable number of ways for generating main energy for us which is electricity. Today, the main way of generating energy is by means of burning fossil fuels which causes carbon emission. For this reason, our world gets to use other ways so as to generate our main energy, electricity. Nowadays, among renewable enregy types, sun’s energy is regarded as a main way of producing electricity although hydropower, bio-oil and wind energy is also fruitful as much as sun’s energy is. Bio-oil from lignocellulose of plants has great potential to be one of the main reneweable energy source. At present, there are only a small number of commercial bio-oil plants because their operation is rather complicated and the return is not attractive. Overall, the best way for combating global warming is to use renewable energy.