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“Currently, ... GHG other than CO2 are measured by ... CO2e. However, this is a false equivalence for GHG that do not accumulate in the atmosphere over time in the way that CO2 does, and has led to an incorrect assumption that all emissions must reach net zero ... /1
“Currently, ... GHG other than CO2 are measured by ... CO2e. However, this is a false equivalence for GHG that do not accumulate in the atmosphere over time in the way that CO2 does, and has led to an incorrect assumption that all emissions must reach net zero ... /1
...Methane ... is a more powerful GHG per kg than CO2, but only about half of 2009’s methane ... remain in the atmosphere today and continue to contribute warming. In contrast, almost all the CO2 from that year remains – and the CO2 will remain and continue to cause warming... /2
...The proposed metric unambiguously links greenhouse gas emissions with their warming outcomes, no matter their lifespan... /3
...”Setting targets in terms of temperature - not emissions - is what is so important,” explains Dr Cain, “because we can get to net-zero warming without net-zero emissions of every greenhouse gas... /4
...Short-lived gases decay quickly, so as long as emissions are declining, warming from those sources is declining too. On the other hand, because CO2 lasts for centuries, even millennia, every tonne continues to add to warming, even as emissions decline...”. /5
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