ENERGY

ENERGY : 

ENERGY Can you imagine life without lights, fans, cars, computers and television, or of fetching water from the well and river? This is what life would have been like had man not discovered the uses of energy – both renewable and nonrenewable sources.…

IMPORTANCE OF ENERGY : 

IMPORTANCE OF ENERGY From the time you wake up to the time you go to sleep at night, energy has affected your life. Energy is important in everyone’s life, whether you notice it or not. Without it people would have a harder time waking up and an even harder time getting anywhere. Energy is needed to heat water, which is used when you take a shower or wash your face in the morning. Just imagine washing your face or taking a shower with ice cold water in the winter. It would be bad. Energy even effects when you put on fresh clothes in the morning. Your clothing were probably made in a factory, which was powered by electricity.

Sources of Energy : 

Sources of Energy Bio - energy Coal Fossil Fuels Geothermal Hydrogen Hydropower Natural Gas Nuclear Oil Solar Wind

BIO-ENERGY : 

BIO-ENERGY Bioenergy is renewable energy made available from materials derived from biological sources. In its most narrow sense it is a synonym to biofuel, which is fuel derived from biological sources. In its broader sense it includes biomass, the biological material used as a biofuel, as well as the social, economic, scientific and technical fields associated with using biological sources for energy.

COAL : 

COAL Coal is a nonrenewable energy source because it takes millions of years to create. The energy in coal comes from the energy stored by plants that lived hundreds of millions of years ago, when the Earth was partly covered with swampy forests. Almost 93% of the coal used in the United States is used for generating electricity.  Except for a small amount of exports, the rest of the coal is used as a basic energy source in many industries including steel, cement, and paper.

FOSSIL FUELS : 

FOSSIL FUELS Fossil fuels are non-renewable resources. The fossil fuels include coal, petroleum, and natural gas which contain high percentages of carbon.The burning of fossil fuels produces around 21.3 billion tonnes of carbon dioxide per year, but it is estimated that natural processes can only absorb about half of that amount, so there is a net increase of 10.65 billion tonnes of atmospheric carbon dioxide per year .

Slide 9: 

The word geothermal comes from the Greek words geo (earth) and therme (heat). So, geothermal energy is heat from within the Earth. We can recover this heat as steam or hot water and use it to heat buildings or generate electricity. Geothermal energy is a renewable energy source because the heat is continuously produced inside the Earth. Geothermal energy does not produce any pollution, and does not contribute to the greenhouse effect. The power stations do not take up much room, so there is not much impact on the environment. GEOTHERMAL ENERGY

Hydroenergy : 

Hydroenergy Hydro energy is simply energy that is taken from water and converted to electricity. Power can also be generated from the energy of tidal forces or wave power, which uses the energy created by waves. Many countries in the world use hydro energy for conversion to electricity. One of the main reasons that hydro energy is used is that it is a renewable energy, meaning it will not be depleted over time and it will consistently be replenished. It is also a clean energy source, as it does not emit any toxins.

Natural Energy : 

Natural Energy Natural gas is an extremely important source of energy for reducing pollution and maintaining a clean and healthy environment. In addition to being a domestically abundant and secure source of energy, the use of natural gas also offers a number of environmental benefits over other sources of energy, particularly other fossil fuels. Natural gas, because of its clean burning nature, has become a very popular fuel for the generation of electricity. In the 1970's and 80's, the choices for most electric utility generators were large coal or nuclear powered plants; but, due to economic, environmental, and technological changes, natural gas has become the fuel of choice for new power plants.

Wind Energy : 

Wind Energy Wind power is renewable and produces no greenhouse gases during operation, such as carbon dioxide and methane. Globally, the long-term technical potential of wind energy is believed to be five times total current global energy production, or 40 times current electricity demand. This could require large amounts of land to be used for wind turbines, particularly in areas of higher wind resources. Offshore resources experience mean wind speeds of ~90% greater than that of land, so offshore resources could contribute substantially more energy.