Report: Global temperatures to rise at least 4°C by 2100

Global average temperatures will rise at least 4°C by 2100 and potentially more than 8°C by 2200 if carbon dioxide emissions are not reduced according to new research published in Nature. Scientists found global climate is more sensitive to carbon dioxide than most previous estimates.

Global temperature hits record levels

Last year tied with 2005 as the warmest year on record, according to data from the National Oceanic and Atmospheric Administration (NOAA).

World is at its warmest since records began, NASA warns

The global temperature over the last 12 months has been the highest on record, according to the latest NASA figures.