Despite debates on the climate crisis often revolve around carbon dioxide (CO2) emissions, methane (CH4) could be the key to limiting future warming: this potent greenhouse gas has a warming potential 84 times greater than that of CO2 over a 20-year period, and has so far been responsible for around 30% of the current rise in global temperature. Some scientists believe that large and unaccounted stores of methane are locked up beneath the Greenland (and Antarctic) ice sheets: as these glaciers continue to melt and retreat, CH4 would be released into the atmosphere at accelerating rates.
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