Fear that Russia may terminate all natural gas flows to Europe's largest economy is causing friction among EU countries.
Natural gas is used to manufacture ammonia, which is a key ingredient in fertilizers.
European leaders worry about the risk of a supply shortage in the winter, though member nations have different levels of energy security.
Several EU nations, including Germany, depend on Russian gas. The Nord Stream pipeline reopens Thursday, but supply is uncertain.
Advanced nations will evaluate the idea in an effort to limit Russia's energy revenue. But Russia could retaliate.
The EU has just unveiled a punitive ban on oil imports from Russia — but the Ukrainian government is unimpressed.
The British move to change unilaterally part of its withdrawal deal with the EU could trigger a trade war with the bloc.
As sanctions take their toll and Russia's leader writes off Western markets, analysts count the costs for the nation's people and businesses.
The economic showdown between Russia and the EU enters a new phase
Victory for Le Pen in France's presidential election would have big repercussions for France — and the rest of the EU
The leader of France's far-right National Rally party has promised radical change if she wins the presidency.