[Paladin2]

Well, we do have an experiment going on where we apparently increase the CO2 concentration in the atmosphere and wait to see what happens. 50 to 100 years should provide a good indication. After we correct for the sun and all other drivers, of course.

[Mrs. Don-o]

But "No Rise of Atmospheric Carbon Dioxide Fraction in Past 160 Years, New Research Finds" (according to Science Daily, 12/31/2009). They found the CO2 is absorbed by plants and oceans. Who'd'a thunk it.