A. Sahara
B. Arctic
C. Amazon
D. Himalayas

One of the most concerning scientific issues raised in the 2026 climate reports is permafrost feedback loops in the Arctic. Permafrost, the Arctic’s perennially frozen ground, is starting to thaw as the region warms almost four times faster than the rest of the world. Massive amounts of sequestered organic carbon are released during this process as powerful greenhouse gases like carbon dioxide and methane, which hasten global warming.

Key Points About Arctic Permafrost Feedback Loops:

Approximately 1,500 billion tons of carbon are stored in Arctic permafrost, which is nearly twice the amount that is now in the atmosphere.
Warming releases greenhouse gases, melts permafrost, speeds up warming, and melts more permafrost.
Methane, a greenhouse gas 25–80 times more potent than CO2 over brief periods of time, is released when permafrost thaws.
Unchecked permafrost thawing might cause irreversible climate tipping points and undermine the objectives of the Paris Agreement.