Why is hydropower a non-conventional source of energy?

Growing population led to increasing energy demand along with reduction in dependency on conventional energy sources has prompted industry to shift towards renewable energy sources. Hydropower market is expected to gain popularity over the next eight years on account of reduction in hazardous gases emission. read more

Hydropower market is anticipated to grow over the forecast period due to some key advantages such as flood control ability, water retention and energy demand fluctuation management. Global hydropower market is projected to foster the growth owing to the cleanest source of energy which can be renewed. read more

It was a non-conventional source a couple of centuries ago when people still traveled in animal driven vehicles but now hydro energy is common. But it's pretty common these days so I would call it conventional. But even calling hydel energy non-conventional energy doesn't change anything about it. read more

(B) Non conventional energy sources: The conventional energy sources discussed above are exhaust­ible and in some cases, installation of plants to get energy is highly expensive. In order to meet the energy demand of increased popu­lation, the scientists developed alternate nonconventional natural Resources sources of energy which should be renewable and provide a pol­lution free environment. read more

Hydropower, generated mainly from hydroelectric dams, is a clean, renewable, non-emitting source of energy that provides low-cost electricity and helps reduce carbon emissions. U.S. hydroelectric generation is the second largest in the world, providing 7% of domestic electricity production and much larger percentages in the western states. read more