9. Answer in a sentence II

1. Why fossil fuels are to be conserved?

 

Fossil fuels are found surface of the earthdeep inside the earth's crust, which are energy-rich substances created over millions of yearshundreds of years. The formation of fossil fuels is a fast processslow process and occurs through natural processes such as the anaerobic decomposition of buried dead animalsaerobic decomposition of buried dead animals. Since the formation of fossil fuels takes a very long period of time for renewal, fossil fuels needs to be conserved.

 

2. Solar energy is a renewable energy. How?

 

Solar energy is a renewable source of energy as it is not availablereadily available in our country and is free of cost. It is also a/an inexhaustible resourceexhaustible resource, not environment friendlyenvironment-friendly, and is unsustainablesustainable.

 

3. How are e-wastes generated?

 

E-wastes are spoiled, outdatedupdated, and non-repairable repairable electrical and electronic gadgets.