Avoiding global climate chaos will require a major transformation of society and the world economy that is "unprecedented in scale," the UN said on Monday in a landmark report that warns time is running out to avert disaster.

Earth's surface has warmed one degree Celsius - enough to lift oceans and unleash a crescendo of deadly storms, floods and droughts - and is on track towards an unliveable 3C or 4C rise.

[link to www.telegraph.co.uk (secure)]



If the earth temperature increase exceeds about 3.5 °C, 40-70% of species will extinct. So by the year 2030, probably 5%-10% of the earth species will die off.