I guess there are no replies because the level of CO2 during the Cambrian period was actually 4,000ppm which is 10x the current levels and not 1,000x current levels that the prize idiot kept quoting and his silly followers kept parroting because they didn't know any better.
Hopefully they do now and will respect science a bit more in the future.
For the record it was teeming with primitive life back then, life that would have been impossible had the atmosphere been close to that of Venus as Plimer would have you believe.
