"Nearly half of Canada’s land mass lies above permafrost. As it thaws, greenhouse gases stored for centuries in the frozen ground are released and once-stable land is susceptible to collapse"
"River banks have slumped, forests have been lost and buildings have shifted and cracked on soft ground. Lakes and ponds have drained in some places and formed in others where once-solid land has collapsed.
Permafrost, which underlies 40 per cent of Canada’s landmass, is continuously frozen earth beneath the surface layers that freeze and thaw with the seasons.
But with northern Canada warming about three times as fast as the rest of the world, climate change threatens the permanence of vast stretches of this frozen ground — and the ecosystems and communities it supports."
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