And until such time as solar becomes the dominant tech, let us not forget that QMC & our Dr.Wong have demonstrated a realistic usage for QDots as nanobots in downhole petroleum evaluation & detection as well: http://www.qmcdots.com/press/press57.php ....&.... https://www.researchgate.net/publication/277522732_Salt-_and_temperature-stable_quantum_dot_nanoparticles_for_porous_media_flow