Massive amounts of permafrost is melting in Russia releasing tons of methane and unknown pathogens that were once trapped in ice. This isn't the fist time Russia caused the global warming "Siberian volcanic eruptions caused extinction 250 million years ago, new evidence shows This new evidence of a nickel fingerprint at the time of the extinctions convinced the scientists that it was the volcanic upheaval in Siberia that produced intense global warming and other environmental changes that led to the disappearance of more than 90 percent of all species" https://www.sciencedaily.com/releases/2017/10/171002105227.htm
