“The supply of coal and oil, [Frank Shuman] opined, would eventually be depleted. ‘One thing I feel sure of,’ he wrote prophetically in a 1914 Scientific American article, ‘is that the human race must finally utilize direct sun power or revert to barbarism.’” Energy history brings perspective and caution to the real-world prospects of dilute, … Continue reading Solar Optimism and Coal Alarmism a Century Ago