Rhone Resch

Chief Executive of the Solar Energy Industries Assn.

Like Gsänger, Resch, who heads the Solar Energy Industries Assn., a U.S. trade body, will be championing renewable energy at Copenhagen. Solar currently lags wind energy in installed global capacity, but technological improvements, lucrative government subsidies, and falling commodity prices—particularly in polysilicon—soon could make it the world's No. 1 nonpolluting renewable energy source.