Скачать или смотреть Renewable Energy : Grade_12English Unit (8) Part 1

Grade 12 English UNIT 8

RENEWABLE ENERGY

Part (1)

သင်ခန်းစာ ပို့ချချက်

(ယခု ဗီဒီယိုသည် အခြေခံပညာ ကျောင်းသားကျောင်းသူများအတွက် သင်ရိုးတစ်ခုလုံး အခမဲ့ လွယ်ကူစွာလေ့လာနိုင်ရန် ရည်ရွယ်၍ တင်ဆက်ခြင်းဖြစ်ပါသည်။)

Pre-Reading

1.Do you use a lot of electricity at home? And how?

2.In the future, do you think, you will be using more or less electricity than you do now? Why do you think so?

3. How do you understand by the word ‘renewable’?

4. Do you know any renewable energy sources? If so, what renewable energy sources do you use at home?

Read the passage.

We need energy sources for our cars, trains, planes, machines, appliances, and many other energy-consuming vehicles and devices. We rely mainly on fossil fuels such as coal, oil and gas, and we are consuming the world’s fossil fuels at an alarming rate. As a result, the amount of carbon dioxide (CO2) in the atmosphere is increasing dramatically. Burning fossil fuels for decades has been destructive to the natural environment. Much of the destruction of our environment would not have taken place if these fossil fuels had not been used. In recent years, a great deal of attention has been paid to the dangers of consuming fossil fuels. In addition, the Earth is running out of fossil fuels, which means that there is a need for alternative sources of energy for use on a wide scale. Therefore, it is essential for us to use renewable energy instead of fossil fuels. Now, the use of renewable energy is becoming more and more common worldwide.

Renewable Energy and its Benefits

Renewable energy refers to ‘energy that is produced using the sun, wind, water, etc. rather than using fuels such as oil, gas and coal’. The sun, wind, water, waste and heat are all rich renewable energy. These energy sources can never run out or are inexhaustible and so they are known as renewable energy sources. Specifically, energy from the sun is considered an inexhaustible resource; as long as the sun exists, it gives us energy. Moreover, renewable energy sources can be recovered or produced without causing CO2 emissions, air pollution and global warming. Renewable energy production is certainly essential if we are to prevent further environmental problems. There are many examples of renewable energy sources such as hydropower, wind power, solar energy and geothermal energy.Hydropower
Hydropower utilizes the power of moving water such as waterfalls and rivers and the sea. Electricity is generated when moving water turns turbines. As long as flowing water continues, it gives us an inexhaustible amount of energy. Hydropower dams are also a source of renewable energy. Power is generated when water from the dam is released through turbines. Although hydropower plants hardly emit any pollutants into the air, there are a few drawbacks. Water-powered turbines can have a negative effect on aquatic wildlife. Also, building hydropower dams causes land behind the dams to flood. One more drawback is that the costs of installing hydropower systems are high.

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