By Kate Abnett BRUSSELS (Reuters) – Climate change campaigners held a wave of protests for Earth Day on Friday, pushing demands such as an immediate halt to European imports of Russian oil and gas, and an end to building fossil fuel infrastructure. In Europe, activists in Berlin, Warsaw, Brussels and elsewhere targeted German government or embassy buildings. Germany is one of the European Union countries opposed to an embargo on Russian oil and gas, in response to Russia’s invasion of Ukraine, for fear of damage to their economy. Around 50 activists outside Germany’s representation to the Euro…