Grid cables transporting the power to shore are neither expensive - in the greater scheme of things - nor technologically complicated to roll out, so this is a minor part of the project, according to Mr Bratland.

BBC: Floating challenge for offshore wind turbine

Here, too, states have the power to set the rate providers can charge for transporting electricity from the distribution center to the business or home.

FORBES: Magazine Article

Some people have looked at the idea of grinding up peridotite and using it to soak up emissions from power stations, but the process turns out to be expensive, partly because of the costs of transporting all the rock.

ECONOMIST: Greenhouse gases