MILAN (Reuters) – Europe needs to speed up its efforts to diversify its energy sources because gas supplies from Russia could stop in a few months or in one year time, the Chief Executive of Italy’s Eni Claudio Descalzi said on Wednesday. Speaking at a Chatham House event in London, Descalzi said that European countries have already cut dependence from Russia since the beginning of the Ukraine crisis, adding gas coming from Moscow currently accounts for around 10% of the bloc’s total gas consumption. (Reporting by Francesca Landini, editing Federico Maccioni)