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

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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. The >2 Degree Target.

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

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Rasmussen, who had succeeded Danish Climate and Energy Minister Connie Hedegaard as COP President just two days prior, was quickly replaced by Philip Weech, Director of the Bahamas Environment, Science, and Technology Commission. The relative valuation of potential emissions offsets (e.g.

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