Methane should be given priority on the agenda at the COP26 climate summit this November, in order to reduce near-term climate change
That is important, and frightening, but hardly shocking. The aim of letting the world warm no more than 1.5°C, agreed on in Paris six years ago, is one to which many countries, notably the small-island states for which sea-level rise is an existential threat, are deeply committed. But many observers believe it stringent almost to the point of impossibility.report, though, may come as news to many. If carbon-dioxide emissions were the only means by which humans were changing the climate, 1.
Crutzen’s intervention spurred renewed interest in the idea of intentionally interfering with incoming sunlight, a possibility known as “solar geoengineering”. It is an interest of which theis wary. Solar geoengineering has no role in the scenarios the panel uses to talk about future climates. As a result its new report, like its predecessors, discusses the idea only in broad terms. In doing so it notes, correctly, that the idea has significant drawbacks.
A more palatable approach to offsetting the diminishing effects of sulphate pollution, enthusiastically endorsed by the, is to redouble efforts to reduce emissions of another climate-changing by-product of human civilisation. Methane is a more powerful greenhouse gas than carbon dioxide, but one which lasts in the atmosphere for only about a decade. Reduce methane emissions and you soon reduce methane levels; reduce methane levels and you reduce global warming.
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