An abundance of fossil fuels combined with advances in technology has sent energy prices crashing around the world. Royal Dutch Shell PLC swung to a heavy loss in the second quarter and warned that the outlook for oil-and-gas demand continued to be uncertain, illustrating the scale of damage Covid-19 is wreaking on the industry. The pandemic has decimated demand for oil, hitting prices hard. When around two-thirds of the world’s population was in lockdown in early April, global oil demand fell by a third, according to the International Energy Agency. …