Detailed Summary
This section emphasizes the concept of natural resources, categorizing them as inexhaustible and exhaustible. Inexhaustible resources like sunlight and air are abundant in nature, whereas exhaustible resources like coal and petroleum are finite and can be depleted through human activities.
Coal, a fossil fuel formed from decomposed vegetation under high pressure and temperature, serves various purposes including cooking, electricity generation, and industrial uses. The carbonization process is essential in transforming organic material into coal. Additionally, the section outlines the by-products of coal such as coke, coal gas, and coal tar, detailing their specific applications.
Petroleum, formed from marine organisms, is another critical fossil fuel, refined into various products like petrol and diesel. This process involves separating different fractions to obtain usable fuels and chemicals. The significance of natural gas, especially as CNG for cleaner energy, is also addressed. The section concludes by stressing the necessity for judicious use of these resources to mitigate pollution and prolong their availability, advocating practical conservation tips.