Russia’s escalating attacks on Ukraine’s energy infrastructure could spark a major “humanitarian catastrophe” as the war-battered country braces for the arrival of snow and cold, the government in Kiev said on Saturday. President Volodymyr Zelensky said Russia had fired another 36 missiles at Ukraine on Saturday. “The aggressor continues to terrorize our country,” he said in remarks from Kiev. Many of them were shot down by air defences but others managed to strike energy facilities, he said, urging world powers to help “stop this terror.” He thanked energy service providers and grid operators…