This it has to be a real long term investment, wind farm, alternative enegies etc etc are going to drive lots of new alternative energy concepts and innovations.
People are waking up to the potential of IT's to take small stakes in these new alternatives, some are already proven eg vestas and the like.
This could form a very nice component of your longterm hold in a si-isa! that's what I did.
http://www.trustnet.com/it/funds/?click=top10&fund=67728