Re: Marvin would love this news
"To what extent we are contributing to it is still a very open question."
To the average Joe? Sure, but then Joe may also believe the earth is only 6000 years old.
The more data that is gathered, the more apparent the current warming trend is related to c02, and our release of it. While you can argue "correlation does not equal causation", and "climate is too complex to model accurately", those claims do not hold up to the preponderance of evidence.
Trying to maintain your claim is like saying "I saw Bob enter the pub with a gun. I heard one shot fired, and when he left, police captured him and found powder residue on his hand. We know that no one else left the pub, and a thorough search turned up no other gun. Bob also has a history of shooting guns in pubs, but I just don't believe Bob fired the gun. Correlation doesn't equal causation, don't-cha-know."
We know the release of c02 has an effect on climate -- there is no denying this. We know the level of c02 in the atmosphere is increasing -- there is no denying this. We know our climate is changing -- there is no denying this. All other proposals for why the climate is changing have been found wanting -- there is no denying this. We have models that show c02 being a probable candidate. Yet Bob still didn't pull the trigger?