> While increased CO2 is something to pay> attention to, after all we need air to breath,> the current CO2 levels are still low on a> geologic timeframe,
It looks quite high to me:
http://www.mongabay.com/images/external/2005/co2_var.jpg
Around 375 ppmv today compared to the usual cycle of 200-300 ppmv over the
last half a million years.
