[chrissreef]

I don't think people will slow much of anything down so long as they're getting what they need for their crops (and pple keep paying for it... much like how people buy the Enquirer. If pple stopped buying the papparazzi would go away and "accidents" like P. Diana wouldn't occure (aka extinctions)

Anyway, my post was just curiuos if there were atmospheric/environmental estimates of what CO2 and other things would be like (Nitrous oxide, Mercury etc.) if humans were more conscious about their environmental lifestyle and societies were built on being CO2 neutral and as un-obtrusive as possible.

I guess it can be summed up as estimating how significant our impact has been and if things would even be different if we had been more responsible. Greenbean answered most of my question with his graphs =)