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Question

Salma always switches off electrical appliances such as lights, fans, air conditioners, heaters, etc. When not in use. She says it saves coal and petroleum and helps the environment. Do you agree? Explain

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Solution

Yes, coal and petroleum products are used in the production of electricity. Which runs the electrical appliances at Salma's home. As coal and petroleum are non-renewable sources i.e. once they are used, they cannot be replaced. So, if we use coal and petroleum excessively then a point of time may come when it will not be available at all, which can create a crisis of electric energy. That's why Salma tries to save electricity, which can eventually save coal and petroleum.

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