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Write brief answers to the following question:
 
Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?
 
reserves are very limited. A coal reserve lasts approximately 100 years only. By the speed humans are consuming coal, there's doubt if it lasts for 100 years now. 

The field of is increasing rapidly. From small houses to big factories and power suppliers are using coal prominently. This is resulting in the scarcity of coal. It takes millions of years to nature this inside the earth. But the consumptions are too high that it will not last for long.
 
That is why we should use coal with care and responsibly. Apart from that, we should use other forms of energy.