Richard Branson:

 As complex as the energy crisis is I cannot understand why magnetic energy has not been tapped. It is renewable, eg auto's, bus and train can magnetise itself via the braking mechanism run over a simple magnetic strip that can be painted urgently and then later infused into roads tracks et al.

 Some problems to encounter people with metal fragments eg; pacemakers and hip replacements but that can be easily handled.

 I have a few more ideas but not related to this topic.