There is only one goddess Gaia and Al Gore is her only prophet...

[Zenda]

As for your links on CO2 in plants, I think the most salient statement from the articles was "Predicting the world's overall changes in food production in response to elevated CO2 is virtually impossible."

Good. I didn't want you to rely on crop improvements that might never come.

chemical reactions involving carbon tend to remove it from the atmosphere and fix it into hydrocarbon compounds.

Creating hydrocarbons is not that easy. For starters, it needs oxygen-free environments, remember, which generally do not come into contact with the atmosphere.

methane is produced from methanogenic bacteria, which is another way in which carbon is fixed as long as it remains as submerged hydrates

These bacteria are the cause of methane output by wetlands, yes. Apparantly they haven't learned yet to pack their waste in those neat hydrate structures.

I'm more concerned about understanding the cycle of CO2+H2O --> H2CO3 --> H+ & HCO3- --> H+ & CO3 both in localized and global limits.

Are you concerned about the CO2/H2CO3 equilibrium? It only takes a few seconds for carbonic acid to turn back into CO2, you know. Nothing to worry about. The notation will be clearer if you replace the single arrows by an equal sign. The human body uses this equilibrium to buffer changes in blood acidity, btw. If too much acid is formed, it will be absorbed by the creation of CO2 and H2O. If things get too 'caustic', the opposite will happen.

So, as a life long "green" advocate, I'm concerned we are past the point of corrective balance.

Ah, you're not in denial? You've just given up and want to save me and others from wasting effort?

I see this problem as; The plane is crashing because we are heavy, and maybe in order to save it, everyone needs to help out. But, everyone is arguing about who's luggage gets tossed out first. The lighter weight people feel its only fair that the heavier people toss out their bags first. The coach people want to be sure that the value of the contents of their luggage will be replaced by the airline, or even the first class passengers. Meanwhile, beyond the argument nothing happens and we crash anyway. This is Kyoto, Copenhagen, and the UN in general.

Interesting analogy, but I would make a small change. The lighter weight people don't have any luggage at all, so in order to save the expensive properties of other passengers, they are asked to jump. Then, when they refuse, they will be accused of endangering everyone, and propably thrown out. Ofcourse, since they are light weight and have no luggage, it won't help much and the plane will continue to crash.

It might be better to dump only the fattest passenger, along with his or her belongings.