My wishlist in no specific order. You should consider crowdfunding some of the research- I would be interested in options to support these kind of issues and I'd have no issue with the results being commercialised provided there was some form of "open sourcing" the technology.

  * Green energy
  * Battery technology
  * Water cleansing (ie pollutants from rivers & oceans
  * Water purification
  * Air purification
  * Food production
  * Medical technology