no, in fact it is very cheap and creates no polution whatsoever.....but the dams are hard to take down though..
it is cheap
Because hydroelectric plants are important because they provide a low poultion and cheap energy. The plants are expensive to build.
is oil cheap or expensive
because water comes from chicken eggs
Its expensive
Expensive, costly, precious, priceless, or valuable. Those are opposites of cheap.
no it is cheaper
expensive
expensive opulent, expensive, pricy, highbrow,
Constant maintenance, Initial costs and repair work for the structure. The electricity it produces is cheap though.
Nylon is not an expensive material.