By Guy Faulconbridge LONDON (Reuters) -President Vladimir Putin said on Tuesday that Russia must keep a close eye on its food exports to hostile countries because the West’s sanctions had fomented a global food crisis and spiralling energy prices. The West’s sanctions over Putin’s Feb. 24 invasion of Ukraine have tipped Russia towards its worst economic crisis since the 1991 fall of the Soviet Union, though Moscow says the global impact of the sanctions could be much more significant. The Kremlin chief cautioned that higher energy prices combined with a shortage of fertilisers would prompt the…

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