Wind is an inexhaustible source of energy and aerogenerator can convert it into electricity. Through not much has
so far been done in this field, the survey shows that there is a vast potential for developing wind as an alternative
source of energy. The wind survey has four components -- direction, duration, speed and distribution.
On this basis U P. hill areas have been found an ideal place for setting up aerogenerators. In U.P. hills alone, as
many as 58 sites have been identified.
Only the hilly areas of U.P. were surveyed for setting up aerogenerators
Answer: C
It ia mentioned in the passage that the wind survey showed that there is a vast potential for harnessing wind energy This means that an overall survey must have been made and not only of the hilly areas of U.P.