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Q.

The world’s known coal reserves are predicted to last for about:


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a

200 years

b

400 years

c

500 years

d

100 years 

answer is A.

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Detailed Solution

The world’s known coal reserves are predicted to last for about 200 years.
Coal reserves refer to large deposits of coal, which, based on geological surveys and engineering studies, are thought to exist to a very high degree of certainty. In addition to the knowledge of their existence, these reserves are also accessible, and coal can be produced from them economically. When dead plant matter decays into peat and by the heated coal is buried with the pressure of deep burial over millions of years, it results in the formation of coal.
Based on U.S. coal production in 2017of about o.78 billion  short tons, the recoverable reserves at producing mines would last about 26 years..
        
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