[alx13]

I said ignore the projections. When you look at ppm it's an absolute measurement. If there's 400 ppm, it means that 0.04% of the air is CO2. The ice cores have air in them. (http://www.antarcticglaciers.org/glacier...re-basics/) "Ice coring has been around since the 1950s. Ice cores have been drilled in ice sheets worldwide, but notably in Greenland[3] and Antarctica[4, 5]. High rates of snow accumulation provide excellent time resolution, and bubbles in the ice core preserve actual samples of the world’s ancient atmosphere[6]." They measure the proportion of CO2 in the air. This does not require a fancy model and calibration. Just take the air from the ice and run a chemical analysis.

It amazes me how skeptical the general public is about scientific processes. Most of them aren't nearly as complex or unreliable as people think. Despite popular belief scientists aren't nefarious and/or stupid (in general). They search for facts and the truth. It seems that this is where the major difficulty is. Believing scientists are searching for the truth and keeping tabs on each other along the way, so that the rest of us can take their word for what they find. It seems to me that when people see data that doesn't match their prior beliefs, they just disregard it. Like all those people who didn't believe Galileo.
(sarcastic aside: Really there is a secret global organization of scientists working on a taking over the world with a new international program to brainwash us all. Please go read 1984 for the details of how they are going to do it.)

It's actually nice that you are a scientist and willing to debate with us. Thank you for that

IMO, the model with CO2 emissions is flawed and the governments "selling" it just want more power and influence. Why? Simple math. The population increase is our Planet's biggest problem, and as a consequence ours too. Putting laws on CO2 emissions will not solve the problem when math comes into place. If you make a car consume 50% less CO2 sounds good in theory, but the fact that 3 cars will exist instead of one simply because more people will live on Earth puts the practice under question.

Why aren't the "save the Planet" crowd willing to acknowledge this? Why is no one willing to talk about the real threat to our Planet coming from the fact that we are expanding in an uncontrolled rate which is not sustainable? Because of PR. No one will like you if you say "people should have less babies". But if you say "people should pollute less" everyone will love you.

So forgive me for being skeptical but I don't buy the good intent of the "global warming" crowd. They focus on the smaller part of the problem just because the PR is better and the other subject is tabu.