More recently, energy resources are increasingly scarce and its existence became a major topic of much discussion in the media both print and electronic media. Energy sources that we know so far is the source of energy from fossil fuels. Fossil fuels come from the decomposition of the substances remaining living creature that lived millions of years ago and buried in the soil. Fossil fuel is called petroleum. Supplies of fossil energy sources are becoming increasingly rare to have
an impact on the economy in the world. Based on simple economic law of supply and demand, price changes can be calculated from this petroleum fuels.
Increasingly scarce supplies of fossil fuels makes the price becomes higher. Therefore, now scientists increasingly work hard to find a variety of other alternative energy sources to replace fossil fuels. Alternative energy sources are not simply replacing fossil fuels but also as sources of renewable energy availability.
Below we discuss briefly about the various alternative energy sources are increasingly widespread in many developed countries:
A. Solar Energy
The sun is the source of our most powerful energy. Sunlight, or solar energy, can be used for heating water, generating electricity, indoor air heating, lighting and refrigeration and various industrial processes. Most forms of renewable energy either directly or indirectly derived from the sun. For example, the heat from the sun causes the wind blows, contributing to the growth of trees and other plants used for biomass energy, and plays an important role in the cycle of evaporation and precipitation is the source of water energy.
B. Wind Energy
Wind is air movement that occurs when warm air rises and cooler air to replace it soon fills. Wind energy has been used for centuries as a driver of sailing ships and windmills to grind wheat. Today, wind energy wind turbines used for propulsion and is used to generate electricity.
C. Hydropower
The flow of water is an incredible force of nature. Water is a renewable resource, continues to be filled by a global cycle of evaporation and precipitation. The sun's heat causes the water in lakes and oceans evaporate and form clouds. The water then falls back to earth as rain or snow, and flows into rivers and streams that flow back into the sea. Flowing water can be used to turn turbines that drive a mechanical process to turn a generator. Energy flowing water can be used to generate electricity. So this process called Hydroelectric Power.
D. Biodiesel
Biodiesel. The basic ingredients of this fuel made from plants such as soy, coconut and the like, biodiesel is non-toxic fuel that can be mixed with regular diesel or used as is to reduce emissions.
E. Hydrogen
Hydrogen has tremendous potential as a source of fuel and energy, but the technology needed to realize this potential is still in its early stages. Hydrogen is the most common element on Earth. Water is a two-thirds hydrogen, but hydrogen in nature is always found in combination with other elements. After being separated from other elements, hydrogen can be used to driven vehicles, replacing natural gas for heating and cooking, and to generate electricity.
F. Geothermal Energy
Heat in the earth produces steam and hot water that can be used for generate electricity or for other applications such as space heating and electricity generation for the industry. Geothermal energy can be drawn from underground reservoirs by drilling, or from the geothermal reservoir is located closer to the surface.
G. Ocean Energy
Oceans provide some form of renewable energy, and each driven by different forces. Energy from ocean waves and tides can be harnessed to generate electricity, and ocean-thermal energy from heat stored in sea-water can also be converted into electricity.
Although at the present time, ocean energy technologies that require expensive compared to other alternative energy sources, but the sea is still important as a source of potential energy for the future.
an impact on the economy in the world. Based on simple economic law of supply and demand, price changes can be calculated from this petroleum fuels.
Increasingly scarce supplies of fossil fuels makes the price becomes higher. Therefore, now scientists increasingly work hard to find a variety of other alternative energy sources to replace fossil fuels. Alternative energy sources are not simply replacing fossil fuels but also as sources of renewable energy availability.
Below we discuss briefly about the various alternative energy sources are increasingly widespread in many developed countries:
A. Solar Energy
The sun is the source of our most powerful energy. Sunlight, or solar energy, can be used for heating water, generating electricity, indoor air heating, lighting and refrigeration and various industrial processes. Most forms of renewable energy either directly or indirectly derived from the sun. For example, the heat from the sun causes the wind blows, contributing to the growth of trees and other plants used for biomass energy, and plays an important role in the cycle of evaporation and precipitation is the source of water energy.
B. Wind Energy
Wind is air movement that occurs when warm air rises and cooler air to replace it soon fills. Wind energy has been used for centuries as a driver of sailing ships and windmills to grind wheat. Today, wind energy wind turbines used for propulsion and is used to generate electricity.
C. Hydropower
The flow of water is an incredible force of nature. Water is a renewable resource, continues to be filled by a global cycle of evaporation and precipitation. The sun's heat causes the water in lakes and oceans evaporate and form clouds. The water then falls back to earth as rain or snow, and flows into rivers and streams that flow back into the sea. Flowing water can be used to turn turbines that drive a mechanical process to turn a generator. Energy flowing water can be used to generate electricity. So this process called Hydroelectric Power.
D. Biodiesel
Biodiesel. The basic ingredients of this fuel made from plants such as soy, coconut and the like, biodiesel is non-toxic fuel that can be mixed with regular diesel or used as is to reduce emissions.
E. Hydrogen
Hydrogen has tremendous potential as a source of fuel and energy, but the technology needed to realize this potential is still in its early stages. Hydrogen is the most common element on Earth. Water is a two-thirds hydrogen, but hydrogen in nature is always found in combination with other elements. After being separated from other elements, hydrogen can be used to driven vehicles, replacing natural gas for heating and cooking, and to generate electricity.
F. Geothermal Energy
Heat in the earth produces steam and hot water that can be used for generate electricity or for other applications such as space heating and electricity generation for the industry. Geothermal energy can be drawn from underground reservoirs by drilling, or from the geothermal reservoir is located closer to the surface.
G. Ocean Energy
Oceans provide some form of renewable energy, and each driven by different forces. Energy from ocean waves and tides can be harnessed to generate electricity, and ocean-thermal energy from heat stored in sea-water can also be converted into electricity.
Although at the present time, ocean energy technologies that require expensive compared to other alternative energy sources, but the sea is still important as a source of potential energy for the future.
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