Wind blowing on the ocean surface waves generated constantly. This is an abundant energy source, but it is difficult to collect achievement extends them to convert into useful energy. This is also a form of endless energy, not create waste, does not require high maintenance and all free. However ocean waves almost impossible to predict so kind dependence on natural models too large. Also not every place is suitable building energy models as well as its noise will be very high, not as soothing noise of waves that poets often similes. 2.2.6 Energy from Ground (Geothermal-Power) energy from the ground long appeared through the state as volcanoes, hot springs, hot springs ... In theory on 36 meters deep in the ground, it will increase by 1 degrees C and the temperature at the center of the earth can be up to 6000 degrees C. The water was pumped into the area with high temperature and steam goes up from the ground to contribute to the process of energy conversion from heat to electricity ability to use or are using direct heat source there. This is a natural resource, but recovery is slow, due to the natural process of regeneration we need long time. Therefore, if overexploitation can lead to not recover anymore. This type of model does not account for a large area so little affect ecology. However, finding suitable locations for this model is not easy, requiring technical and high-tech probe by the uneven distribution of heat flow, high heat flow areas of geology often young, are active tectonics and volcanism. The average composition of the emission geothermal steam 95%, 5% carbon dioxide, Hydrosulfur, methane, several rare gases, Hg, As ... therefore the solubility of mineral elements in geothermal water can creating precipitation in equipment systems, reducing efficiency and increasing costs quickly. Besides, the noise generated and the surrounding land subsidence due to geothermal exploitation are also two notable issues. 2.2.7 Energy from Biomass (Biomass Energy) Biomass from agricultural waste products are Industry (straw, bagasse, bark, corn fiber etc ..), forestry waste (dry leaves, wood chips etc ..), and pulp, methane from landfills, wastewater treatment plants , feces from cattle feedlots and poultry. Biomass fuel may be in solid, liquid, gas ... are burnt to release energy. Biomass, particularly wood, wood charcoal (charcoal) provide significant energy part of the world. At least half the world's population-based primary energy sources from biomass. People have been using them for heating and cooking for thousands of years ago. Currently, wood is still used as fuel common in developing countries. Biomass can also be converted into liquid fuels such as methanol, ethanol used in internal combustion engines; or in the form of biogas (biogas) applications for energy needs in family size. This is a very attractive energy source with great benefits for the environment and social economy, especially in terms of rural development. Biomass energy is not only renewable, but also make use of waste as fuel. Hence it reduces the amount of spam has recently turning waste into useful products. Burning biomass CO2 emissions but also sulfur and ash levels were significantly lower compared with the burning of coal. We can also balance the amount of CO2 released into the atmosphere by planting trees to absorb them. So to be renewable biomass alternative to biomass was used last should not increase atmospheric CO2. Thus, the development of biomass energy reduces adverse climate change, reduce acid rain, reduce pressure on landfills etc ... However, we should note that, if the increased use of wood as a biomass fuel source will cause negative impacts on the environment. Timber harvesting led to deforestation, soil erosion, desertification and other serious consequences. Biomass energy can take many forms, and the benefits listed above are mainly focused on biomass renewable nature, utilizing waste from agriculture and forestry. 2.3 Other forms of energy are two types of energy also was born out of fuel in the energy conversion process then there are other forms of energy are also appearing in our daily lives through the process of storing energy in various forms, such as pumped storage hydropower (Pumped Storage Reservervoirs), Hydrogen (Hydrogen), fuel cells (Fuel Cell). 2.3.1Thuy Electric Power Meters (Pumped Storage reservoirs)
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