ruffrecords said:
No, those figures showed the amount of CO2 being put into the atmosphere by humans is insignificant.
Can you post the numbers showing it was insignificant? I remember the human contribution of CO2 every ten years was about equal to the exchange rates, which seemed pretty significant.
I have done calculations on the atmospheric concentration of CO2 and the numbers are small - but small numbers do not necessarily mean something is insignificant.
Atmospheric CO2 levels do correlate with global temps from geological records. However, the geological records show that CO2 changes tend to happen around 600 years after the event the initiated them. In other words, the current increase in atmospheric CO2 is an effect not a cause of changing temperatures.
In the geologic record, CO2
lagged temperature changes. That is true. But never before have the stored CO2 reserves (fossil fuels) been rapidly converted to atmospheric CO2, like humans have been doing for the last 100 years. The current rise in CO2 is having a leading effect on temperature rise. It's uncharted territory.
Unfortunately CO2 is a very mild greenhouse gas. Unfortunately water vapour, which is exists in much greater abundance than CO2, is is much more powerful greenhouse gas.
ruffrecords said:
The fact is there is a lot more water vapour than there is CO2. The fact is water vapour is a more powerful greenhouse gas than CO2.
The change in CO2 is called a forcing term in science. It may be weak effect if considered in isolation, but in a complicated system, the small change in CO2 may shift the equilibrium significantly. Why? Think of the atmosphere in equilibrium. If CO2 increases, causing a slight temperature increase, but then water vapor increases due to the rise in temp and has a multiplicative effect, then the new equilibrium will be significantly further off than the simple change in CO2 would do on its own.
This would be a positive feedback scenario.
Ideally a stable equilibrium would have negative feedback instead of positive feedback.
The prudent thing to do would stop modifying the system until we know more. That is why the world is transitioning to non-fossil fuel energy. Changing the status quo of converting stored hydrocarbon reserves to atmospheric CO2 is the first step in an engineering solution to climate change.
As to what to do if more is needed - imagine a technology that was self sustaining, absorbed CO2 from the atmosphere, and provided a great building material on top of it. Yes, trees. Pretty amazing
As has been posted before though, the unsustainable rise in population is the elephant in the room .