The European Union has enough gas for the winter but could face a shortage next year if Russia cuts supplies further, the International Energy Agency (IEA) said on Monday, urging governments to act faster to save energy and expand renewables. The head of the agency, Fatih Birol, warned that "the crisis is not over" and said shortages may occur in 2023 rather than 2022, as the 27-member bloc stored enough supply to get through the winter.