OECD analysis suggests that unless action is taken, global greenhouse gas emissions will rise by about 70% between now and 2050, and that by 2100 there could be a 4-6 °C global mean increase in temperatures above pre-industrial levels.

The map shows that as the Himalayan glaciers melt, 23% of the population of China could be deprived of vital, dry season, glacial melt water by 2050. It also shows that an estimated mean sea-level rise of 53 cm by 2075 would result in floods affecting an additional 150 million people, particularly in Asia.

Mr Gurría said that the map "constitutes an invaluable contribution to raise awareness of the size of the challenge". He added, "The scientific evidence is overwhelming, the economic logic is compelling, and the costs of inaction are frightening."

© OECD Observer, No. 275, November 2009