The cogeneration units can produce up to sixty to eight mega watts of power. The excess power generated is transmitted to the national grid. Such power is integrated to the national grid for distribution to all categories of power consumers. The power utilities would have signed power purchasing agreement with the mills producing power through cogeneration units to take care of the surplus power. Most of the governments support cogeneration units by offering subsidies. This is to ensure that there is adequate and surplus production of power to meet the demands of the consumers. Most of the developed countries have cogeneration units, which produce energy in excess. They not only serve as back up for the power utilities, but also step in whenever they are required to meet the demand.

Bio fuel is also used to power the generators to generate electricity. Bio fuel is produced from naturally grown trees such as jatropha and other grain and corn plants. The bio fuels are mixed with other fuels at a certain blending, which then us used to run the power generators. The third form of biomass based power projects is the biogas, which is produced using animal waste. Cow dung is dumped in a vacuum enclosure. The closed environment produces methane gas or bio gas, which can be stored. This bio gas can be used as cooking gas as well as energy to produce light.

Wind energy is a huge business worldwide. This alternative energy resource now is one of the most popular forms of power production. There are large wind farms and wind parks all over the world that produce green energy to power small localities and towns. One wind mill can produce up to 6 mega watts that power small communities. There are three categories of wind mills. They are small wind mills, mid range wind mills and large wind mills. The small wind mills serve minor purposes. The large wind mills are huge and managed by power utilities. Private entrepreneurs also manage wind mills.

The water stored in the dams along the sea coast is made to flow at great speeds to run the turbines during low tide period. The fast running turbines generate electricity through magnetism. The power is then transmitted to the national grid. The second methodology employs submerged turbines to produce electricity. Turbines linked to huge fans are submerged under fast moving water. The flow makes the fans turn, which in turn run the turbines. The turbines generate electricity through magnetism and the same is transmitted to the national grid. Since the tidal energy projects require huge investments, initially, the governments manage the tidal energy projects. Besides, since the tidal energy projects need public sites, they are yet to witness private participation in a big way.

Solar power can be harnessed by installing solar photo voltaic modules. These modules are manufactured using silicon. The photo voltaic cells have the power to trap sunlight and store it in the form of energy. This energy can be converted into light and heat forms. If water is run through the solar modules, it gets heated. Similarly solar energy can power the home lighting and street lighting. Many industries have installed massive solar photo voltaic cells to harness solar power. This greatly reduces the burden on the power utilities, which are being forced to produce more power as the demand increases. These days, solar powered automobiles are also being developed for trial runs. Contests are held to determine the power of solar energy. Cars run for long distances by drawing power from solar energy.

The light emitted by the incandescent lamps is equivalent to the light emitted by combined four filament based lamps. The spread of light by the incandescent lamps is also much more than the filament based lamps. Households can reduce their electricity bills as well as reduce the burden faced by the power utilities, by installing incandescent lamps. The incandescent lamps are popular in the UK also. In some countries, the local governments offer subsidy to households which have installed the incandescent lamps. Even enterprises and industries install the incandescent lamps in big numbers to bring down their electricity budgets. It has been found that the incandescent lamps have helped households reduce their power bills greatly.

The biofuels are acquired from natural sources such as tree of jatropha, grains and sugarcane. The biofuels help generate electricity by running engines. Similarly, power produced by biogas plants is also gaining popularity. Biogas is produced by dumping animal waste and cow dung into a vacuumed enclosure. This environment produces an organic reaction on account of which bio gas or methane is produced. This gas is then stored in containers. The biogas is not only used as cooking gas, but can also produce electricity in minor quantities to power a small house. These days villages and individual houses are encouraged to install a biogas plant since it is cheap and cost effective. It also reduces the burden on power utilities.

Many power utilities in developed countries are exploring with various alternative energy resources to add strength to the national grid. The latest innovation in the alternative energy sector is tidal energy. Power is produced from tides on the sea cost by building mini dams stretching for long distances. This alternative energy form has become popular in the Scandinavian countries, which are producing tidal energy. Basically, a tidal power plant is run by a government agency since it requires various approvals and investments. The tidal energy plants are based on twin technologies. The first technology employs flow of water to run the turbines. Water is drawn into a dam during high tide and released with great force during low tide. The flowing water causes the turbines to generate power. The second technology has blades inserted in the water to turn whenever the water flows through them The turning blades are connected to the turbine, which produces power.

The production of renewable energy is not economically feasible in some countries since they are yet to acquire the required technology. Besides, they are not popular in the developing countries, which rely heavily on traditional forms of power production. However, in the developed countries, such as the UK, renewable energy business is doing well. Among the renewable energy resources, the solar energy and wind energy are the most popular forms. Solar energy and wind farms are found in all developed countries. They contribute some amount to the national electricity grid. Renewable energy resources can also cater to the mass demand. Big wind parks and farms are set up to supply electricity. The wind farms should be ideally located on sea shores or hill tops where strong winds blow and help production of power. Solar energy is very popular in the developing countries since they provide light and power in remote hilly areas during nights.

Electricity is produced by all forms of conventional energy resources. A great amount of this electricity is lost due to transmission and distribution problems. Besides, the power consumption is on the rise as population increases with corresponding growth in industrialization. An unit of electricity saved is equivalent to an unit of electricity generated. Therefore, the households are advised to use minimum electricity. It means unnecessarily power consuming appliances should not be run. The focus is more on educating the consumers to reduce their reliance on electricity generated from conventional forms of energy and turn to renewable energy resources. Solar energy and wind energy have emerged as the most preferred renewable energy resources.