Though many environmentalists and other proponents strongly advocate solar energy as a primesource of power, harvesting it and using it on a long-term basis is problematic. Until more of these basicproblems have been ironed out, there seems to be little hope that this will turn into a major source ofenergy for our communities.
36. What can be inferred from the passage?
(A) The author regards solar energy as an inexhaustible energy.
(B) Solar energy is an efficient alternative.
(C) The author is less optimistic than the environmentalists with regard to the use of solar energy.
(D) Many environmentalists protest against the problematic use of solar energy.
(E) It is totally impossible to use solar energy.