Since 2006, the amount of heat-trapping methane in Earth's atmosphere has been rising fast and, unlike the rise in carbon dioxide (CO₂), methane's recent increase seems to be driven by biological emissions, not the burning of fossil fuels.
In glacial terminations, the entire climate system reorganizes. In the past, this took Earth out of stable ice age climates and into warm interglacials. But we are already in a warm interglacial.
What comes next is hard to imagine: loss of sea ice in the Arctic in summer, thinning or partial collapse of the ice caps in Greenland and West Antarctica, reorganization of the Atlantic's ocean currents and the poleward expansion of tropical weather circulation patterns. The consequences, both for the biosphere in general and food production in south and east Asia and parts of Africa in particular, would be very significant.: plugging leaks in the oil and gas industry, covering landfills with soil, reducing crop-waste burning. Shooting the methane messenger won't stop climate change, which is primarily driven by CO₂ emissions, but it will help.
Roman numerals IX to I denote past great climate transitions. There is no Roman number zero, but then any future termination-scale transition will be different – a temperature step from our present interglacial climate to some new future that is warmer yet. Methane's signal is still unclear, but the question remains: has
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