[yanellena]

You do have to build very expensive transmission lines to transport that energy. In some places in the world it's simply not economically viable.

[red-iron-pine]

In some places there are volcanos. The "in some places" argument doesn't hold, when it's clearly very effective in many other ones.

Plus most of humanity lives within the same 100 mile range of water, esp. oceans, and the bulk of humanity live in areas with lots of sun.