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Rohit always cycles to school but his fr...

Rohit always cycles to school but his friend Ramesh is dropped by his father in a car.
How does Rohit help to clean the environment by cycling to school?

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Rohit helps in making judicious use of petrol which is an exhaustible resource. This will lead to sustainable development. Burning of petrol leads to air pollution by emitting smoke and gases which contribute to global warming. Thus by cycling he helps to clean the environment and motivates others to do the same.
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