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प्रश्न
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?
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उत्तर
If all the exhaustible natural resources are exhausted by human activities, then the survival of living beings would not be possible. Actually, fossil fuels are the most important source of energy for us today. They are concentrated source of energy and give off heat and light on burning. The heat can be used to cook food or to run engines such as automobile engines. It can be used to generate electricity as in powerhouse where the most common fuel used is coal.
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संबंधित प्रश्न
Name any one hydrocarbon fraction obtained during the fractional distillation of petroleum which is used as a domestic fuel.
Explain why, natural gas is considered to be a good fuel.
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
Compare and contrast biomass and hydroelectricity as sources of energy.
The source of energy of the sun is:
(a) conversion of hydrogen gas into helium
(b) conversion of carbon fuel into carbon dioxide
(c) burning of hydrogen gas present in the sun
(d) disintegration of uranium into barium and krypton
Can you tell?
Why should we save energy?
Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?
Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one nonconventional source of energy.
Various materials which are obtained from nature are called natural resources. Which of the following is not a natural resource?
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
