Europe’s energy ambitions are clear: to shift to a low-carbon future by remaking its power generating and distribution systems. But the present situation is an expensive mess. A global supply crunch for natural gas, bottlenecks for renewable energy and wind speeds in the North Sea among the slowest in 20 years, idling turbines, have contributed to soaring electricity prices. As winter approaches, governments are preparing to intervene if needed in volatile energy markets to keep homes warm and f