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प्रश्न
Explain why is it no wise to regard wood as a renewable sources of energy.
उत्तर
Use of wood is a renewable source but is not advised to use, because saplings take a long time to become a tree.
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संबंधित प्रश्न
"The calorific value of cooking gas (LPG) is 50 kJ/g". What does it mean?
Name any one hydrocarbon fraction obtained during the fractional distillation of petroleum which is used as a domestic fuel.
Which gaseous fuel is being used increasingly in transport vehicles like cars and buses these days?
Write a short note on the pollution caused by burning fossil fuels.
State whether the following statement is true or false:
Tidal energy is one of the forms in which solar energy manifests itself in oceans.
Fill in the blank
Coal, petroleum, and natural gas are _________fuels.
State whether the following is True or False.
Renewable energy resources have limited supply in nature.
Exhaustible natural resources are
Write True/False against the following statement.
Wildlife is an exhaustible natural resource.
Complete the crossword in figure with the help of the clues :
Across
1. Fuels obtained from dead remains of living organisms. (6, 5)
2. A process by which the various constituents of petroleum are separated. (8)
3. A porous black substance obtained from coal. (4)
4. Another name for motor fuel. (6)
Down
5. The substance obtained by carbonisation. (4)
6. Fuel for heavy motor vehicles. (6)
7. A petroleum product used for road surfacing. (7)
8. Dead remains of sea animals got converted into it. (9)
