It is hard to live without Energy, but it is impossible to find another planet to live in. Energy is everything. It comes in many forms such as heat, electricity, light, mechanical energy. Conventional energy sources such as coal and oil are the main contributors to the global warming. Further more, these fossil fuels are not renewable, which means one day we will run out of them. The good news is alternative sources of energy can replace the current technologies we are using. These renewable energy sources are environment friendly as they emit less carbon dioxide, compared to fossil fuels. There are many alternative sources of energies that harness natural forces and resources such as solar power, wind power, and geothermal energy.
From environmental prospective solar power is the best alternative source of energy. It is the light and the heat from the sun which is harnessed to generate power. It is created by converting the sun rays into electricity using solar panels. Additionally, solar panels change the sun light that hit it into heat, which is used to heat homes, water, swimming pools, and for cooking. There is also another energy sources that is safe and natural in the same time.
Wind power is one of the oldest forms of energy that benefited mankind so greatly. It is the use of the wind power to produce electricity. In the past, people used it to navigate water, to pump water and to dry clothes. Today, we use it to produce electricity. In this technology, when the wind blows, it rotates the blades of the wind turbines. This rotation runs electric generators. There is one more source of energy which can be used as an alternative to fossil fuels.
Geothermal energy is one of the main sources of alternative energy. It is the heat of the earth, which is continuously produced in the core of the earth. It is very beneficial to the earth and it atmosphere as it doesn't produce any pollution. In this technology, Wells are drilled to pump heated water and steam. Then, that steam and heated water are purified to drive wind turbines which produce electricity. It works best in sunny climate regions.
Energy is everything. It can be found in many forms. Fossil fuels cause many environmental issues due to the emission of carbon dioxide. However, alternative source of energy can substitute traditional energy sources with almost no negative effects on the environment. One of the alternative energy sources is solar power. In smaller scale, it is used to heat houses, water and in cooking. In larger scale, it is used to generate electricity. Another source is wind power. Older wind turbines used to grind crops, now to run generators and generate electricity. A third source is geothermal energy, in which, heated water and steam are used to run generators.
Energy is the capacity to work. We use energy at various levels in different forms. It is used in the kitchen for cooking food to run machines at the factories. The motor vehicles, the trains, the turbines and the aero planes are driven by the energy. The exploration of Antarctica or the arrival of man on the moon is only possible by harnessing energy rich fuels.
Energy provides the power to progress. Its uses at present life are manifold. We cannot grow without it. More the man is advancing towards modernity, more he is becoming dependent on energy. From the prehistoric period, when man first came to know about the use of fire, till date, it plays a key role in the economic and social developments of mankind.
A nation is considered rich not by amount of minerals or industrial resources it possesses, but by its technical ability it has acquired and scientific progress it is making, which depends ultimately on the supply and consumption of energy. The per capita daily consumption of energy of the developed countries is much higher in comparison to the developing countries like India.
Energy consumption pattern of selected nations
We have 15 per cent of world's population; but we consume only 2 per cent of the world's total energy. Whereas countries like USA, Canada, UK, Japan etc. have very less population but their energy consumption is much higher. That is the main reason for which these countries are categorized under 'developed' and India under 'developing' countries. The common units for expression of energy are calorie and BTU or British thermal unit when the quantity is large; we express it in Mega Watt (MW).
Along with all other natural resources like air, water, land, forestry and fisheries, energy also occupies an important place. Our progress And prosperity depend solely upon it. Natural resources, energy and Environment are intimate related. Distributed or any one would definitely cause disturbances in other two.
Energy is required for beneficial use of natural resources and the resources, on the other hand, provide energy. The interaction of these two in the environment in safe and tolerable limit is called 'limit of tolerance*. When this is disturbed, great disasters occur.
Depending on the source and availability, energy resources are mainly of two types.
(i) Non-conventional or renewable energy.
(ii) Conventional or non-renewable energy.
(i) Non-conventional or renewable energy
It is a type of non-replenish able or non-exhaustible form obtained from the continuous or repetitive currents of energy occurring in the natural environment. As the source of energy is unlimited, it is also called infinite or renewable energy.
The examples are: Biomass and Biogas Solar, Wind, Tidal, Minihydel and Geothermal.
(ii) Conventional energy
All the non-renewable types of energy come under this category. In this case, the raw materials that provide energy can not be replaced. Once it is used, its stock is depleted for ever. The common types are coal, Oil Natural gas and recently the Nuclear energy.