Most people don’t doubt that there is a greenhouse effect of CO2. I guess there are some who do, but I believe they are in a minority.
The questions have to do with:
How much warming is occurring because of man’s contribution to CO2 in the air? (Or, in other words, what would the temperature be without our contribution?) How much of “climate change” is attributable to variations in the sun’s radiation or other natural causes?
Assuming there is some measurable, and verifiable, contribution by man, what are the risks of letting it continue, and what are the costs to remediate it?
Is there a positive feedback, with a tipping point, which will cause the temperature to soar? Or is the atmosphere self-correcting, with negative feedback?
I know there are other important questions as well, but at the moment, those are the ones which occur to me.
One more thing. I am not particularly enamored of complex computer models which are used to try to simulate complex systems like the climate, and especially to forecast the earth’s temperature decades in the future.
I am really surprised at how persuaded the AGW scientists are in the validity of the projections of their models. They are willing to spend vast sums of tax dollars and greatly harm our standard of living to try to avert the temperature rise predicted by their models.
If they could spend a trillion dollars and lower the earth’s temperature by one tenth of a degree, I believe they would do it. Of course, it’s not their trillion dollars. In fact, they would probably get grant money from that trillion to support more of their research.
No, the computer models should be tested for many years before they are trusted to predict the climate decades ahead.
Your kidding right? Everyone I know knows that CO2 does NOT create a greehouse effect. CO2 does not “float” up into the atmoshpere - simple 8th grade physical science. I think you are a troll. Is that you Al Gore?
Those are very good questions (all three).