Practicing Success
Match the following:
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1- D, 2- A, 3- B, 4-C 1- C, 2- A, 3- B, 4-D 1- C, 2- D, 3- B, 4-A 1- B, 2- A, 3- D, 4-C |
1- D, 2- A, 3- B, 4-C |
There are commercial and non-commercial sources of energy. Commercial sources are coal, petroleum and electricity as they are bought and sold. Non-commercial sources of energy are fuelwood, agricultural waste and dried dung. These are non- commercial as they are not available in the market on a large scale. Both commercial and non-commercial sources of energy are known as conventional sources of energy. There are three other sources of energy that are commonly termed non-conventional sources — solar energy, wind energy and tidal power. |