From the BBC:
"The last time the Earth experienced a comparable concentration of CO2 was 3-5 million years ago, when the temperature was 2-3C warmer and sea level was 10-20 metres higher than now," said World Meteorological Organization Secretary-General Petteri Taalas.
Jolly good, let's take that at face value.
What strikes me is that they are always telling us that the CO2 concentration in the air is so high that we have reached, or about to reach some sort of tipping point, a point of no return, irreversible climate change, runaway global warming etc.
So why don't they tell us what happened last time CO2 levels were this high? Did temperatures continue shooting up? According to the long term temperature chart here, nothing much happened and we happen to be near the top of a 100,000 year cycle.
So the next Ice Age will be upon us soon enough. Brrr!
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