As ministers begin arriving at the UN climate talks in South Africa, new science is showing the challenges they face in trying to curb global warming.
Using new methodology, a Swiss team has calculated that about three-quarters of the global warming seen since 1950 is down to human influences.
A second report says glacier loss in the Himalayas is accelerating.
And an international research group has confirmed that emissions have soared despite the financial crisis
- BBC Ceefax 4/12/2011
It is our deeds, the accumulated acts of goodness and kindness, that define us and ultimately are the true measure of our worth. Service is the coin of the spirit.