Unless new reserves are found , the world's supply of coal is being depleted in such a way that with demand continuing to grow at present rate, reserves will be exhausted by the year 2050. What is the best conclusion that can be drawn from the above paragraph ?
ক) It is the time to search for alternative
খ) New reserves of coal would be found before 2050
গ) Demand for coal is growing fast
ঘ) World's coal reserve is declining
