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The world is an energy problem. The selection of the most important energy source, the oil gradually. The use of oil, coal and other fossil fuels pollute the planet with greenhouse gases that capture heat from sunlight in a danger level.

But alternative energy sources to more environmental problems. Some of them occupy large areas of the country, as biofuel production, large solar plants and wind turbines. use of agricultural landto produce bio-diesel, methanol, ethanol can reason or another bio-fuel a chronic hunger catastrophe. Others, such as nuclear power plants could accidentally destroy the environment in large areas of potentially kill millions of people. In addition, payment of deposits of radioactive waste can give the same effect. But nuclear power is very nice if all goes well.

As we have seen, there are no easy solutions or stylish political or technical. The problem must be tackled by a smartcombination of different means.

An important element in the solution is energy conservation. If it is possible for a car, technology and logistics to use, how to use energy efficiently as possible. "We must also stop the use of energy for activities that lead to greater comfort, does not profit of any kind, or give only marginal value as a result. Through the use of more efficient energy resources, energy needs worldwide could fall by as 30%.

Then useOil and coal should be replaced with all kinds of alternative energy sources, but no alternative to use in such a way that extension or new problems.

Part of the solution is the use of bio-diesel and other bio-fuels derived from wastes from agricultural soils. In the process of converting waste to produce content of minerals in the desert are also available, and probably sold as fertilizer. But it is only ethical for bio-fuel crops, because they can cause foodshortages and food prices.

Using solar energy into electricity, a large part of the solution. In theory, every roof and exterior walls in the world to be covered by solar panels, although it is not possible or practical estheticly goes too far. Woeste few other values can also be used to store large installations. However, there is a limit to the number of solar panels can be mounted before the environment is disturbed.

MuchElectricity can be produced by wind turbines as today, but there is a limit to the number and size of the wild-mill parks that you can specify the area is heavily disturbed. In areas like Denmark and northern Germany, the disturbing effects can already be seen clearly.

In many areas, the waves in the sea or the flow of water and can be used to produce electricity in an economic market, but again there is a limit to how far you can go for the construction of wave or tidal powerplants before destroying the environment.

Wind can also be used directly as it was in previous periods. Cells can be mounted on a large vessel, especially in the transport of large loads. But your teeth will probably be very different from sailing old ships to see and be automatically by a computer industry.

Many countries have a special natural energy that easily lend themselves to exploitation. Geothermal energy is one of them. Iceland is widely usedgeothermal direct heat or electricity. This technology can be extended for use in areas where geothermal heat is a bit 'more hidden, but still relatively near the surface.

Heat using a reverse refrigeration technology to transfer heat from outside a building where a temperature high concentration. Heat can be used to heat the building or other programs. It needs heatelectricity to operate, but extract more energy from the outside to the consumer. A more extensive use of heat pumps can provide a large amount of energy used for heating, heat pumps can. Also used for low-temperature geothermal, and bring it to focus on a higher temperature without digging very deep.

hydroelectric power plants use natural fall of water from high to low areas have long been an important source of electricity, and many of the existing structures can bemore effective. In a sense, the new plant to be built, but there is a limit to this technology, the impact on the environment to suffer.

Unfortunately you can not prevent the use of nuclear energy today, after the energy crisis will be resolved. There is a new development in this area, making nuclear power less dangerous. Researchers are now developing a new type of reactors that will be used as fuel, thorium, and work subcritically.The answers to these reactors can not be out of control. Woods will cease after a few hundred years, not thousands, so storage of the waste stream would be less problematic. But still there will be waste treated to be safe.

Most alternative energy sources produce electricity, but not always practical to use electricity directly. But you can use electricity to produce hydrogen and hydrogen can then be used as a clean fuelapplications where electricity is not easy.

In long-term use of fusion probably the final solution. But commercial fusion power plants will probably not be in forty years.The following is a wildcard that can appear to save the world energy problem: cold fusion. It works as a real phenomenon and not a misunderstanding, as many believed and still believe. But people still do not know if this can be used for virtuallythe production of useful energy.