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Short Article on “Alternative Energy Sources” The rapid increase in the demand of energy has caused worry about its supply. The main sources of energy are conventional sources. They are non-renewable and exhaustible sources. : The demand of energy has increased all over the world and the condition poses a threat on the sources of energy like Petroleum and Natural gas by the year 2030-35 if any alternative sources do not substitute or supplement them. The Government of India gives high priority to the use of alternative, non-conventional and renewable energy sources as supplement to the depleting conventional sources of energy. These alternative sources include – Solar energy, Wind energy, Geo-thermal energy, Tidal energy, Biomass energy etc. These energy sources have huge potential of energy and they can be useful in various ways. Solar energy is a wide source. Solar cells, solar cookers, solar ponds etc are the devices to trap solar energy. It can produce electricity, cook food, heat water and can be converted to other forms of energy. The solar photovoltaic system which uses solar cells to convert the solar energy into electrical energy is the most promising and progressive sources of alternative energy. Wind energy is in form of Kinetic Energy. A blade of windmill is moved by blowing winds and could be exploited for doing work. Theoretically about 60% of the wind energy can be converted into other forms of energy. Wind mill farms are being set up in the world to exploit this energy at suitable places. Geothermal energy can be used to produce electricity. However, the inner heat of the Earth not available everywhere which can be commercially exploited. Such potential has been found in Pegu valley in Jammu and Kashmir in India. Tidal energy associated with the kinetic energy of tides can be converted into electricity by using turbine. In the coastal areas this possibility is available. Biomass energy is being used in villages but improvement in method and scientific equipments can increase utilisation. It reduces waste materials and gives cheap energy. Jathropa is a plant that produces diesel and it is pollution free. Besides the railways lines, Jathropa planting is in implementation. Hydrogen is also proved to be a great advantageous source of energy. Nowadays, nuclear energy is gaining utmost importance. These alternative sources of energy promise a new horizon in sustainable manner.

Câu 1:what has caused worry about the demand of energy

Caau2:what are the alternative?

Caau3:What can solar energy produce?

Read the following passage and choose the correct answer.

We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable. Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution. On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.

36. Which sentence is NOT TRUE about non-renewable energy sources?

A. They take millions of years to form. B. They will run out someday C. They come from fossil fuels D. they are always available

37. Which sentence is TRUE about renewable energy sources?

A. They are bad for the environment B. They are not always available C. They are called green energy D. They can be used up

38. When does the chemical reaction take place?

A. When we use energy from the wind. B. When we burn fossil fuels C. When we use green energy D. When global warming happens

39. What is NOT INCLUDED in the five types of green energy?

A. solar B. hydroelectric C. natural gas D. biomass

40. What does geothermal come from?

A. dead plants B. heat within the earth C. the wind D. moving water

II. Read the passage carefully and then do the tasks.

We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable.

Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution.

On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.

A. Decide if the flowing statements are True (T) or False (F)

1.     Non -renewable energy is a source of energy that will eventually run out.

2.      Renewable energy comes from natural sources, like sunlight, wind, water, and heat of the Earth.

3.      Burning fossil fuels is harmful to the environment.

4.      Renewable resources are better for the environment, but they are limited in supply.

5.       carbon is the main element in fossil fuels.

Wind is the primary source of hydroelectricity energy. 

B. Answer the questions.

1.     What are fossil fuels?..............................................................

2.      When were fossil fuels formed?.............................................................

3.       Do carbon dioxide emissions causes climate change on Earth?..................................

4.       How many types of renewable energy sources are there? What are they?

5.      Are renewable sources bad for the environment?.............................................................

Why is renewable energy called green energy?     

II. Read the passage carefully and then do the tasks.
We use many different energy sources to do work for us. Energy sources are classified into two groups -
renewable and nonrenewable.
Non-renewable energy sources are those that take millions of years to form and will run out some day. It is
energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of
carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil
fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is
one of the green house gases which is contributing to global warming and air pollution.
On the other hand, renewable energy sources will never run out, are better for the environment and do not
cause pollution. Renewable energy is often called green energy because it is a natural energy, always available
and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the
Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types
include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from
moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.
A. Decide if the flowing statements are True (T) or False (F)
1. Non –renewable energy is a source of energy that will eventually run out.
2. Renewable energy comes from natural sources, like sunlight, wind, water, and heat of the Earth.
3. Burning fossil fuels is harmful to the environment.
4. Renewable resources are better for the environment, but they are limited in supply.
5. carbon is the main element in fossil fuels.
6. Wind is the primary source of hydroelectricity energy.
B. Answer the questions.
1. What are fossil fuels? ……………………………………….
2. When were fossil fuels formed? ……………………………………..
3. Do carbon dioxide emissions causes climate change on Earth?.............................
4. How many types of renewable energy sources are there? What are they?
…………………………………………….

5. Are renewable sources bad for the environment?…………………………………….
6. Why is renewable energy called green energy?......................................................

Read the following passage and decide whether the statements are true (T) or false (F).

We use many different energy sources for the sake of us. Energy sources are classified into two groups: non-renewable and renewable.

Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution.

On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like non-renewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the wind blows throughout the year. The five types include solar energy from the Sun; geothermal energy from heat within the Earth; hydroelectric energy from moving water; biogas from dead plants and microorganisms and finally, energy from the wind.

II. Read the passage carefully and then do the tasks. We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable. Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution. On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind. A. Decide if the flowing statements are True (T) or False (F) 1. Non -renewable energy is a source of energy that will eventually run out. 2. Renewable energy comes from natural sources, like sunlight, wind, water, and heat of the Earth. 3. Burning fossil fuels is harmful to the environment. 4. Renewable resources are better for the environment, but they are limited in supply. 5. carbon is the main element in fossil fuels. 6. Wind is the primary source of hydroelectricity energy. B. Answer the questions. 1. What are fossil fuels?​ 2. When were fossil fuels formed?​ 3. Do carbon dioxide emissions causes climate change on Earth?​ 4. How many types of renewable energy sources are there? What are they? 5. Are renewable sources bad for the environment?​ 6. Why is renewable energy called green energy

We use many different energy sources to do work for us. Energy sources are classified into two groups - renewable and nonrenewable.

Non-renewable energy sources are those that take millions of years to form and will run out some day. It is energy that comes from fossil fuels such as coal, crude oil, and natural gas. Fossil fuels are mainly made up of carbon and were formed millions of years ago. The chemical reaction which takes place when we burn fossil fuels releases carbon compounds such as carbon monoxide and carbon dioxide into the air. Carbon dioxide is one of the green house gases which is contributing to global warming and air pollution.

On the other hand, renewable energy sources will never run out, are better for the environment and do not cause pollution. Renewable energy is often called green energy because it is a natural energy, always available and does not have to be formed like nonrenewable energy. The green energy is always there. For example, the Sun consistently shines, water is abundant, and the winds blow throughout the year. The five types include solar, energy from the Sun; geothermal, energy from heat within the Earth; hydroelectric, energy from moving water; biomass, energy from dead plants and microorganisms and finally, energy from the wind.

1. What are fossil fuels?

_____________________________________________

2. When were fossil fuels formed?

_____________________________________________

3. Do carbon dioxide emissions causes climate change on Earth?

_____________________________________________

4. How many types of renewable energy sources are there? What are they?

_____________________________________________

5. Are renewable sources bad for the environment?

_____________________________________________

6. Why is renewable energy called green energy?