Thawing earth once thought to be permanently frozen is springing to life and threatening a crucial chunk of Russia’s economy. The melting of the thick layer of the earth known as permafrost is a result of climate change, according to scientists and Russia government research. Two-thirds of the country sits on such soil, including much of its oil and gas infrastructure. Since 1976, Russia’s average temperature has risen 0.92 degree Fahrenheit per decade, or 2½ times the global pace, government data shows.
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