Hi Barb - my response to this question: How do we know that it is man that is causing the increased CO2 levels? is that even though I'm not convinced man can control the current climate change - or that the current climate change is solely due to Human influences as many would have us believe.. is that I've no doubt we are putting massive amounts of CO2 into the atmosphere - just the breakdown of the carbon chain in all the fossil fuels will do it - and I know there are other natural sources of hot house gases, but we are putting a lot of the CO2 out there.

I've no doubt Man is at fault for the rise in CO2..

Like you, I've questions about the CO2 driving the climate engine..especially when there are conflicting reports - and the CO2 historically only has risen after the temperatures have risen.. but there's again no 'truth' to this query.. just 2 sides loudly yelling about it.

As an aside - I thought this was kinda interesting - see the link below.

Canie

• BioMass - reduce CO2 - produce Oil for ethanol