On 28/01/13 3:23 PM, Mike Mitchell wrote:
I remember that too but I thought the amount of CO2 increase was substantially higher than the current increase we were seeing in the atmosphere. Does anyone remember the amount? If it was additionally increased to represent some other effect (perhaps time)?
The Wiki article on the topic looks quite good: http://en.wikipedia.org/wiki/Carbon_dioxide_in_Earth%27s_atmosphere Well, to me but I wouldn't know any better. I think they did test to higher proportions (the figure of 450 ppm comes to mind, though I couldn't confirm it without seeing the program again - which is entirely feasible later this century).
One little aside is that as a kid I recall reading that CO2 was around 330 ppm (in books published in the 70s), and nowadays, figures of 380-390 are quoted, so there has been a more than 10% rise in my lifetime. -- 73 de Tony VK3JED http://vkradio.com