Unless new reserves are found soon, the world's supply of coal is being ............ in such a way that with demand continuing to grow at present rates, reserves will be ............ by the year 2050
Correct Answer: (2) depleted ............ exhausted
Solution:Deplete (Verb) means reduce greatly the quantity, size, power or value of (something).
For example,
(i) Our stock of food is greatly depleted.
(ii) This expense has depleted our funds.
Exhaust (Verb) means use up completely; make empty; take out the contents of : exhaust a well.
For example,
The money he had, was exhausted.
So, the answer is (2).