Although the outbreak of Globe War I and the discovery of cheap oil in the 1930s discouraged the improvement of solar Electricity, Shuman's vision, and fundamental structure were being resurrected during the seventies with a new wave of interest in solar thermal energy.[twenty five] In 1916 Shuman was quoted in https://augustpgugp.blog-eye.com/36968518/solar-rooftop-สกลนคร-an-overview