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प्रश्न
We read in newspapers that burning of fuels is a major cause of global warming. Explain why.
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उत्तर
Burning of fuels is a major cause of global warming because they produce a lot of greenhouse gas ‘carbon dioxide’ on burning. The earth’s atmosphere allows most of the sunlight that falls on it to pass through and heat the surface. But greenhouse gases such as carbon dioxide, methane, water vapours trap the heat radiated from earth. This leads to an increase in earth’s temperature. This is known as greenhouse effect. When concentration of greenhouse gases such as carbon dioxide increases, greenhouse effect also increases. This is known as global warming. It may cause melting of ice caps and glaciers resulting the rise in sea levels.
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संबंधित प्रश्न
Process of separation of different constituents from petroleum is called ______.
Explain the process of formation of petroleum.
Why are coal and petroleum categorised as natural resources? Give a reason as to why they should be used judiciously.
Which fossil fuel is conserved when we save on electricity?
Which fossil fuel is conserved when we use bicycle for covering short distances instead of a motorbike?
Fill in the following blanks with suitable words :
LPG is a ........... fuel but biogas is not a..........fuel.
The poisonous gas which reduces the oxygen-carrying capacity of blood to a large extent is :
(a) SO2
(b) NO
(c) CO
(d) CO2
There are two important fuels A and B both of which are extracted from deep inside the earth. Fuel A is a thick, dark, foul smelling liquid whereas fuel B is a black solid. Combustion of both the fuels produces products, C, D, E and F. The product C makes the rainwater only slightly acidic but it is mainly responsible for causing global warming. The product D is neither acidic nor basic. It is harmless and does not affect the environment in any way. Both E and F attack breathing system of humans and are mainly responsible for causing acid rain. In addition to combustion of fuels A and B, the product F is also formed when lightning occurs in the sky.
(a) What are (i) fuel A, and (ii) fuel B?
(b) Name (i) C (ii) D (iii) E, and (iv) F
(c) What is the process of formation of F during lightning known as?
(d) Which fuel is supposed to be exhausted sooner : A or B?
(e) Which fuel is mostly used for generating electricity at thermal power plants?
What are fossil fuels?
Petroleum, ______ and ______ are fossil fuels.
