Q17 of 76 Page 258

Why is the process of 'reuse' better than that of 'recycling' ?

Reuse is better than recycling because reuse requires little or no expenditure of extra energy. However, recycling requires a lot of extra energy and produces more pollutants thus also causes harm to the environment.


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15

Write the full names of

(a) CFL, and (b) CFC.

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Choose one term from the following which include all others :

coal, natural gas, fossil fuels, petroleum

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Name a clean gaseous fuel other than LPG and natural gas.

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Fill in the following blanks with suitable words :

(a) LPG is a ......... fuel but biogas is not a..........fuel.


(b) Glaciers are a source of ...........


(c) One of the main aim of management of forests and wildlife is to conserve the ........... which we hav inherited.


(d) Khadin is a traditional ............ harvesting system in Rajasthan.


(e) When a fuel bums in an insufficient supply of air, then some poisonous gas called ........ is also produced.