Avoiding Dangerous Climate Change (2005 conference)

The conference took place under the United Kingdom's presidency of the G8, with the participation of around 200 "internationally renowned" scientists from 30 countries.

[2] The conference was one of many meetings leading up to the 2015 Paris Agreement, at which the international community agreed to limit global warming to no more than 2 °C in order to have a 50-50 chance of avoiding dangerous climate change.

[4] Specifically, the conference explored three issues: Among the conclusions reached, the most significant was a new assessment of the link between the concentration of greenhouse gases in the atmosphere and the increase in global temperature levels.

It had generally been assumed that this would occur if greenhouse gas concentrations rose above 550 ppm carbon dioxide equivalent by volume.

[5] The conference concluded that, at the level of 550 ppm, it was likely that 2 °C would be exceeded, according to the projections of more recent climate models.

Global carbon dioxide emissions through year 2004
Global average surface temperature 1880 to 2015, with a zero variance point set at the average temperature between 1961 and 1990