We use energy at every sphere of life. Hence,the world looking towards alternative energy sources such as wind power,solar power,hydroelectric energy,geothermal energy and nuclear energy. Alternative energy has its pros and cons. Just to share a few you: Consistent wind is needed for continuous power generation. If wind speed decreases,less electricity is generated. Solar power is not only used for heating and cooking but also for production of electricity. In this,suns rays hit a solar thermal panel,which converts sunlight into energy. Solar power is a renewable resource. As long as the Sun exists,its energy will reach the Earth. However,solar power does not work if the sun is not shining. At night and on cloudy days,the amount of energy produced is limited. Solar power stations can be expensive to build.
n Aishwarya Bindal,IX-c,
Ryan international school,
In todays world,many countries have started utilizing alternative sources of energy. From my perspective,there are both positive and negative effects to discuss about whether governments need to promote alternative sources of energy or not.
To begin with,alternative sources of energy are one of the best ways to save natural resources. For example,solar energy,which is widely used in Germany,can replace conventional energy sources such as coal and fossil fuel. Alternative sources of energy,including hydroelectric power and wind power,are environment-friendly. Some alternative sources of energy are hazardous. For instance,the explosions at nuclear power plants in Japan and Ukraine have caused serious problems in the short-term as well as the long term.
n Ambika Natholia,IX-c,
Ryan International school,
It is our time to act and think about nature. It has given so much to us; now its time to give back to nature. For generating electricity,we can use many alternative sources like wind,sun,water. We require energy in every activity of life. For example,cooking,lighting,running gadgets,etc. The energy obtained from the sun is solar energy. The second form of energy we can use wind energy. The third source of energy we can use is flowing water.
n Hasti Harish Chandarana,X A
Whether alternative energy sources such as bio-fuels,hydrogen,solar,geothermal or nuclear energy can meet energy demands better than finite fossil fuels such as oil and coal remains hotly debated. PROS: proponents of alternative energy argue that fossil fuels are inefficient unsustainable,environmentally destructive and primary contributor to climate change. They say renewable energy is a viable and immediately needed alternative to fossil fuel use. CONS: opponents contend that many technological hurdles have to be overcome before alternative energy can replace even a small portion of power provided by fossil fuels,which will last for hundreds of years,and reliance on inefficient alternative energies will hurt the economy.
n Jill Mehta,IX B
St Francis High School,Vasai
First of all,we must know why alternative energy sources are required. Presently,for all development work,we need electricity. Electricity can be produced through coal,gas and diesel,known as thermal energy. It can also be produced from hydroelectric sources like rivers and through atomic power plants. The need for electricity is increasing day by day. Coal,diesel and gas are limited on the earth and it is estimated after half a century,these may not be available. Uranium is limited resource,it is hazordous and very costly. It is felt that we must use energy which is endless,cheap for the welfare of people. Alternative sources of energy are the best option. The sun and wind may be called alternative sources of energy. Alternative energy does not pollute,is efficient,abundant and cheaper. It is also renewable. However,even after a lot of research,we are unable to tap it fully. At present,the apparatus for solar energy is costly and has less life.
n Neha Subhani
Ryan International school,
With the advent of industrialization,natural resources started depleting rapidly,forcing the humans to search for alternative sources of energy. After heavy research and million dollars spent,scientists have found myriad sources of energy other than fossil fuels,petroleum,etc.
Alternative sources of energy,now used worldwide,have solved a lot of questions. But as every coin has two sides,even alternative sources of energy have their pros and cons. There are many advantages of alternative sources of energy. Although alternative sources protect our environment,they are costly and economically backward regions cannot afford them. Renewable energy sources depend largely on naturally occurring factors. For example,if it doesnt rain enough,hydroelectric power plants production will be hampered. Similarly,without enough sunlight,it may not be possible to generate solar energy as efficiently.
n Pranav Damu,X B
Cambridge School,Kandivali (E)
The total world energy demand is expected to reach 820 quadrillion Btu in 2040,from 524 quadrillion Btu in 2010. Currently,about 80 per cent of the energy demand is met through fossil fuels,use of which is a major cause of global warming,and resources are also depleting. Development of alternative sources of energy like hydro,solar,wind,geothermal and tidal,which are renewable in nature,is a must if we want to see our future generations not starving for energy.
Alternative sources of energy have several advantages. Being renewable,they are inexhaustible. They are available everywhere,and hence sustainable. These are clean sources of energy,which neither pollute,nor contribute towards global warming. There is no cost for fuel. However,these sources have their disadvantages,too. Conversion of these freely available sources into useful energy for mankind is costly today owing to technological challenges,and hence they cannot completely overthrow conventional sources of energy.
n Raksha Raina,X -A,
Ryan International school,
In the 21st century,people are talking about pollution,not only in this world but also in outer space.The world is expanding at an incredibly fast rate and matching the pace of its increase is the menace of pollution. Every day,people talk about pollution and its detrimental effect,but today I will talk about its solution: alternative energy.
Today,alternative energy resources have become a matter of intense contemplation so much so that many people believe them to be the only way we can ensure or survival. A major benefit of these is that they arise from sources that that are renewable and biodegradable.
n Samveed Desai,X-B,
Cambridge School,Kandivali (E)
In todays rapidly technologically advancing world,the subject of energy sources has become a cause for concern. Technology is something that need energy,and until now,the main source of energy has been fossil fuels,which have been depleting alarmingly due to their excessive usage by humans. In such a scenario,it is necessary that an alternative source of energy be found. Currently,the major alternative sources of energy are: solar energy,wind energy,hydroelectric energy,tidal energy,and geothermal energy.
Given environmental concerns about building new dams to capture hydroelectric energy,further expansion of hydroelectric power may be controversial in various places.
Hence,the use of alternative sources has its pros and cons and its growth depends on the point of view of the people concerned.
n Sarthak Jain,X-G
Ryan International School,Malad
The renewable sources of energy are also called alternative energy sources,which can be renewed and used continuously. Sunlight,wind,tides and geothermal,etc,are some examples of such energy sources. They comprise around 16 per cent of total global energy consumed daily. These sources of energy are mostly used for generating electricity,heating,etc.
However,there are its pros and cons. Looking at the pros,in addition to easy availability,they help produce clean energy that does not pollute the environment. Also solar energy can be easily tapped for domestic use. The cost of maintaining the equipment required for this energy is also relatively less. It may also help in economic growth and job opportunities.
On the other hand,the drawbacks are,it would be difficult to produce the energy in large quantity as compared to the nonrenewable sources. The initial capital required maybe high,like constructing a dam is expensive.
n Om Gholap,Grade 6
Ryan Global School,Chembur