Just one little remark to the energy network idea: He is talking about active switched and buffered energy transmission. This is sometimes called a smart grid. It works by accounting for every amount of energy put into and taken of of the system and directs the required amount from the available sources to the destinations that need it, while buffering any exessive amount for later use. This would work like a big distributed battery, which can be filled when we have energy and drained when there is a need. This would allow distributed renewable sources to be used without unbalancing the network and also allows energy reuse, like regenerative braking in electric wehicles. I think this is a good idea.