The Point of No Return: Melting Permafrost Poses Major Threat to Climate Change
Permafrost, or permanently frozen ground - soil, sediment or rock that remains at or below 0° Celsius for at least two continuous years - makes up about 24 percent of the exposed land mass in the Northern Hemisphere: that’s approximately 22.79 million square kilometers. Permafrost can be thousands of years old, or it can be just beginning. Either way, as permafrost thaws, it jeopardizes both man-made structures and natural features. Thawing permafrost on mountain slopes can lead to landslides.
And it’s melting.
Besides posing threats to structures and landscapes on a local scale, melting permafrost emits carbon dioxide and methane, according to the Commonwealth Scientific and Industrial Research Organisation (CSIRO), making permafrost a threat on a global scale.







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