There is a 50-50 chance of temperature rises reaching dangerous levels over the next century, climate scientists have warned.
Even with heavy cuts in greenhouse gas emissions of 3 per cent a year from 2015, the chance of preventing the temperature rise from exceeding 2C by 2050 is no more than half. And every decade's delay in reducing emissions will cause temperatures to go up by half a degree.
Four more rounds of formal negotiations are scheduled before the Dec 7-18 talks in Copenhagen. These are June 1-12 in Bonn, Germany; Aug 10-14 in Bonn; Sept 28 to Oct 9 in Bangkok; and Nov 2-6, at a venue yet to be decided.
In addition, heads of state and government will gather in September at a U.N. climate change summit in New York and President Obama will host a major economies forum on the sidelines of the G8 in Italy in July. Two other meetings convened by the United States will take place, one probably 26-27 May in Paris and another in June.
