Q30 of 36 Page 28

While driving what are the tips we must follow to save petrol/ diesel/natural gas?

The tips to follow are:

a) Drive at constant or moderate speed.


b) Checking pressure of tyres at regular intervals.


c) Regular servicing and maintenance of vehicles.


d) Switch off engines of vehicles at traffic signals.


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28

We say fossil fuels will last only for a few hundred years. Comment.

 29

We read in newspapers that burning of fuels is a major cause of global warming. Explain why.

 31

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?

 32

Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.