What are the salient features of Non-Conventional Energy Resources?

Merits:

1. NCES are available in nature, free of cost.

2. They cause very little pollution. Thus, by and large, they are environmental friendly.

3. They are inexhaustible.

4. They have low gestation period.

Demerits:

1) Though available freely in nature, the cost of harnessing energy from NCES is high, as in general, these are available in dilute forms of energy.

2) Uncertainty of availability: the energy flow depends on various natural phenomena beyond human control.

3) Difficulty in transporting this form of energy.