Germany issued an “early warning” of possible natural gas shortages on Wednesday over a payments dispute with Russia that could lead to energy rationing in Europe’s biggest economy. CNN reports that the German government said Wednesday that the country had enough gas for now, but it urged all consumers to reduce their use as far as possible with immediate effect. Moscow said last week that it wanted to be paid in rubles, rather than US dollars or euros as per existing gas supply contracts, and threatened to cut off supplies if that didn’t happen.