The dark scenarios

Global warming: impacts of temperature increases

(Reuters) - The Intergovernmental Panel on Climate Change (IPCC) will publish a report, the most complete overview of climate change science, in Paris on February 2. It will guide policy makers combating global warming.

A draft of the report projects temperatures rising by 2 to 4.5 Celsius (3.6 to 8.1 Fahrenheit) above pre-industrial levels by 2100, with a "best estimate" of a 3C (5.4 F) rise.

Below are some estimates of the global implications of different temperature rises relative to pre-industrial levels, as detailed in a report on climate change by Nicholas Stern, chief British government economist, published in October.

( The scenarios )