Comment by avmich

> The raw material costs of producing and manufacturing windturbines has not been significantly reduced.

Perhaps, but we're talking about environmental concerns, not directly economical or material.

> You still need mostly as much stuff now to make one as you needed years ago

Suppose.

> and the same goes for the transport of everything that goes into the turbine, because the energy density of electrical sources isn't high enough to say, power a containership.

No, you're wrong here. Majority of pollutions from transport come from cars, and those demonstrated significant improvement over decades. More, there is no physical law forbidding transport ships using green energy sources - be that electrical (yes, batteries), wind (sails) or something else (hydrogen? nuclear?). And in fact we do see more and more examples of transport which runs on green sources - even planes.

Yes, batteries have lower energy density than gas. But batteries have enough energy density to be usable, and their characteristics improve lately; that's good enough for practical purposes. Not to mention, of course, theoretical possibility.