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Devil In The Details: Is Copenhagens 2 ºC Guardrail Obsolete?

Green Car Congress

A maximum concentration of 450 ppm carbon dioxide (~550 ppm CO 2 equivalent) in the Earth’s atmosphere is commonly cited as the limit at which average temperatures can be held at 2 ºC, and many emissions reduction proposals are based upon these two “upper bounds” targets. ºF) above pre-industrial temperatures.

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Climate Talks End In Copenhagen Accord; Countries Settle On Non- Binding 2 ºC Warming Limit

Green Car Congress

afforestation, avoided deforestation, carbon capture and storage, energy efficiency measures, renewable energy generation) would be established. As heads of state convened, an abbreviated document was hurriedly produced to minimize sticking points and shopped around among leaders of developed countries.

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