Willi Broecker has recently been promoting a scheme to draw down atmospheric CO2 with huge fans, for sequestration. This strikes me as completely ludicrous compared to tapping the non-dilute stream from a power plant.

Some people will go to any lengths to avoid the feared phrase "Plant a tree!". After all, how ludicrous is that? Green plants that sequester carbon... did anyone ever hear something more nonsensical? Didn't we all learn in school that trees produce more CO2 at night than they assimilate at daytime? Didn't we all hear about tree roots that tunnel down to the geological coal deposits to supply the trees with the ever needed carbon?

:-)