LinkedIn discussion thread (started by Faithful+Gould) reveals some details of the tower: http://www.linkedin.com/groups/Solar-Tower-Technology-Western-Arizona-3442439.S.91391159 The project will be privately funded, and we do now have a 100% commitment for project funding of the La Paz Solar Tower. As for the Environmental issues, this is now being progressed in dialogue with a number of govermental and local entities.The collector will likely be using a mixture of ETFE and polycarbonate panelling supported by a steel/al. framework. The intention is for as much UV to pass through the collector as possible. Various suppliers/component materials are under investigation by the Project Team.