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Thawing Arctic permafrost laden with billions of tonnes of greenhouse gases not only threatens the region's critical infrastructure but life across the planet, according a comprehensive scientific review. Nearly 70 percent of the roads, pipelines, cities and industry -- mostly in Russia -- built on the region's softening ground areȂ...

Blanketing a quarter of the northern hemisphere's land mass, permafrost contains twice the carbon currently in the atmosphere, and triple the amount emitted by human activity since 1850

Methane and CO2 escaping from long-frozen soil could accelerate warming while exposure of highly combustible organic matter no longer locked away by ice is also fuelling unprecedented wildfires, making permafrost a triple threat.

Studies show that thawing Arctic permafrost laden with billions of tons of greenhouse gases not only threatens the region's critical infrastructure but also life across the planet.