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प्रश्न
Why should we conserve the non-renewable sources of energy?
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उत्तर
We should conserve the non-renewable sources of energy because if these sources once finished, cannot be regenerated over a reasonable period of time.
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संबंधित प्रश्न
State one important use of CNG these days.
The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.
Name the device
What type of nuclear reaction is responsible for the liberation of energy:
in a nuclear reactor?
Which produced of the nuclear fission of uranium-235 is utilised to cause further fission of its nuclei?
The world's known coal reserves are expected to last for about:
(a) 200 years
(b) 400 years
(c) 500 years
(d) 100 years
Fill in the blank
_______is the coal with the highest percentage of coal.
State the main difference between the renewable and non-renewable sources of energy.
In a hydro power plant ______.
Match the items given in Column I with the items of Column II.
| Column I | Column II |
| (a) Used for road surfacing | (i) Black gold |
| (b) Natural gas | (ii) Vaseline and candles |
| (c) Petroleum | (iii) Bitumen |
| (d) Paraffin wax | (iv) CNG |
Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why? If not, why not?
