Emissions of methane — a powerful greenhouse gas — are rising at the fastest rate in recorded history, scientists said Tuesday, defying global pledges to limit the gas and putting the Earth on a path toward perilous temperature rise.
New research from the Global Carbon Project — an international coalition of scientists that seeks to quantify planet-warming emissions — finds that methane levels in the atmosphere are tracking those projected by the worst-case climate scenarios. Because methane traps about 30 times more heat than carbon dioxide over a 100-year time frame, the accelerating emissions will make it nearly impossible for the world to meet its climate goals, the authors warned.
“These extra methane emissions bring the temperature thresholds ever closer,” said Rob Jackson, a Stanford University climate scientist and chair of the Global Carbon Project. “Warming that was once inconceivable is now perhaps likely.”