By Vera Eckert, Shadia Nasralla and Ron Bousso FRANKFURT/LONDON (Reuters) – People on the streets of Berlin have waved Ukrainian flags in demonstrations of support since Russia invaded Ukraine in February. But those who drove to the rallies did so largely in cars powered by oil from Russia, which provides most of the fuel to the German capital. Just over a third of Germany’s crude oil came from Russia last year, official data shows. Until the invasion of Ukraine in February, the dependence of Europe’s largest economy on cheap energy from Russia – in part, a legacy of the Cold War – was not vie…

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