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ENERGY Energy is the ability to do work. The principle of conservation of energy The energy is neither created nor destroyed only transformed Types of energy There are some types of energy I’m going to speak about some of them: The kinetic energy of a body is an energy that arises in the phenomenon of motion. It is defined as the work required to accelerate a body of a given mass from rest to the speed you have. Electricity is called the form of energy that results from the existence of a potential difference between two points, which allow an electric current between two. The potential energy is the ability of a body to do work Chemical energy is a manifestation of energy. In particular, is one aspect of the internal energy of a body and, although enalways encounter in the field, we are only displayed when a intimacy of this alteration. Nuclear energy is the energy that is released spontaneously or artificially in nuclear reactions. The energy can be renewable or no renewable. Renowable energy It is called renewable energy to the energy obtained virtually inexhaustible natural sources, some for the immense amount of energy they contain, and others because they are able to regenerate by natural means.I can clasificated in HIDRAULIC ENERGY The potential energy accumulated in the waterfalls can be transformed into electrical energy.Hydropower plants harness energy from the rivers to operate turbines that drive an electric generator. Spain uses 15% of this energy to produce electricity. Biomass The formation of biomass from solar energy is carried out by the process called photosynthesis plant which in turn is triggering the biological chain. Through photosynthesis, plants containing chlorophyll, convert carbon dioxide and water without energy mineral products, organic materials with high energy content and in turn provide food for other living beings. Biomass through these processes in the short term stored solar energy in the form of carbon. The energy stored in the photosynthetic process can be further transformed into heat energy, electric or fuel plant, again releasing the stored carbon dioxide. Solar energy is a source of life and origin of most other forms of energy on Earth. Each year brings solar radiation to Earth energy equivalent to several thousand times the amount of energy consumed by humanity. Properly collecting solar radiation, this can be transformed into other forms of energy as heat or electricity using solar panels. Wind energy is the energy from the wind, ie by using kinetic energy generated by air currents. A wind turbine is a generator of electricity from wind kinetic energy is clean energy and also the least expensive to produce, which explains the strong enthusiasm for this technology Geothermal Energy Geothermal energy is energy that can be obtained by man through the use of heat inside the Earth. Part of the Earth's internal heat (5,000 ° C) reaches the earth's crust. In some areas of the planet, near the surface, groundwater may reach boiling point, and therefore serve to power electric turbines or to heat. The heat inside the earth is due to several factors, among which the geothermal gradient and the radiogenic heat. Geothermal comes from the Greek geo, "Land" and the thermos, "hot", literally "heat of the Earth." Tidal energy is due to gravitational forces between the Moon, Earth and the Sun, causing the tides, ie the difference in average height of the seas as the relative position between these three stars. This height difference can be used in strategic places such as gulfs, bays or estuaries using hydraulic turbines that stand in the natural movement of water, along with pipeline and storage mechanisms, for movement on an axis. By coupling to an alternator system can be used for electricity generation, transforming wave energy into electrical energy, a form more useful and usable energy. Nonrenewable Fossil fuels are nonrenewable resources, we can not replace what we spend. At some point, will end, and it may be a need for millions of years of evolution similar to tell them again. Are those whose reserves are limited and will deplete with use. The major ones are nuclear energy and fossil fuels (oil, natural gas and coal). Nuclear energy The atomic nucleus of heavy elements like uranium, can be disintegrated (nuclear fission) and radiant and kinetic energy release. Thermonuclear power plants use this energy to produce electricity through steam turbines. Obtained by breaking the atoms of radioactive minerals in chain reactions that occur inside a nuclear reactor. One consequence of the production activity of this type of energy are nuclear waste, which can take thousands of years to disappear and take a long time to lose radioactivity I think than the best energy is the nuclear energy because, it is pollutant yes, the but is the source that produces more energy and although contaminated, the amount of energy that produces pollution offset with productivity that is. Could build plants in more isolated places and so even if there is a less serious accident, the catastrophe.