The Spirit of Innovation Challenge is a worldwide competition for youth ages 13-18 to create commercially viable products or services to address issues of global sustainability. Categories include "Energy and Environment" (among others). Ideas are submitted by student teams, which can be international, if desired. There is a fee for team registration. The winning teams are offered seed money to continue the development of their ideas. The application deadline is 19 October 2015.
Conrad Foundation -- Spirit of Innovation Challenge 2016