Simone Tagliapietra

Europe's energy crisis loomed larger on Sept. 2 after Russian energy giant Gazprom said it couldn't resume the supply of natural gas through a major pipeline to Germany for now. The company cited what it said was a need for urgent maintenance work to repair key component- in an announcement made just hours before it had been due to restart deliveries.

Faced with rising energy prices, the only thing Europe can quickly do to prevent a potentially difficult winter is to actively promote energy conservation in both the residential and industrial sectors, write Simone Tagliapietra and Georg Zachmann.