Since 1880 temperatures have gone up and down like a yo-yo.
In the last 15 years the temperature has gone down, but that has happened before: the IPCC says it's part of natural variability and it won't continue.
I think it's ironic that at the time when scientists say they are at their most confident what they're saying is correct, climate change is slipping down the political agenda.
Part of the reason for that is people are now more concerned about how big their electricity bills are than where that electricity comes from.
Presenting the most vivid evidence to date, the UN's IPCC report has warned that humans are responsible for changes to the earth's climate.
The UN IPPC report into climate change, due out tomorrow, will say scientists agree the world is getting warmer, and humans are to blame.