European diplomats are racing to rally enough support for proposed rules that would require member states to cut their use of natural gas by 15% if supplies run short this winter because of low deliveries from Russia. A dozen or so of the 27 EU member states have raised concerns about the proposal since it was made public last week. But diplomats involved in the negotiations say there is no "Plan B" to fall back on if members fail to agree on a policy before a scheduled summer recess.
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