Petrol is used in the extraction of metals.
Name two each of the exhaustible and inexhaustible natural resources.
Write the name of two natural substances.
Why are air, water and soil called natural resources?
Why are coal, petroleum and natural gas called fossil fuels?
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Harmful effects of burning fossil fuels are :
(i) Burning of fossil fuels burn with smoky flame which cause in air pollution.
(ii) They also cause global warming because they produce green house gas carbon dioxide gas on burning.