Can anyone tell me what's so hard to understand about this?
For the past 650,000 years the global average temperature has correlated (not linearly) with the concentration of CO2 in the atmosphere.
We (humans) are causing an increase in the concentration of CO2 in the atmosphere.
The concentration of CO2 is now much higher than it has ever been in the last 650,000 years.
Therefore the earth is getting hotter than it ever has in the last 650,000 years, and this is caused by us.
Last edited by cospengle (2007-01-02 18:58:00)