By Marek Strzelecki WARSAW (Reuters) – Poland said on Monday it had terminated its agreement with Russia to receive Russian gas via the Yamal pipeline, after Warsaw rejected a demand to pay for the fuel in roubles and Moscow responded by cutting off supplies in April. Polish Climate Minister Anna Moskwa, who announced the decision on Twitter, told Poland’s PAP news agency that Warsaw’s move did not affect gas flows from Germany to Poland via the pipeline, which is operated by a Polish company. Poland previously said it did not plan to extend the supply contract that had been due to expire at t…