I'm really at a loss as to what your standard for a causal link are.
Let's look at Point 1 again, and it becomes obvious that it's not just a statement.
1. The undeniable fact that carbon dioxide is a greenhouse gas whose specific absorbance (for want of a better term) at infrared wavelengths, can be measured quite accurately and compared to other greenhouse gases.
It is a statement of fact that can be (and has been) verified. It is a basic property of the carbon dioxide molecule to absorb infrared radiation, and I've even described the mechanism for that in terms of bond stretching and vibration.
All the other conclusions stem from that basic fact. CO2 absorbs infrared radiation, and the extent to which it does that, can be measured, and is known to a very high degree of accuracy.
Al the other measurements serve to confirm the mechanism.
It's a basic parameter than can be measured just as easily as the melting point of pure ice under standard conditions.
Quote:Even if we used your analogy, we are way under the legal limit: 0.0387% of CO2 in the atmosphere, if translated to alcohol consumption, is less than a tenth of the legal limit of blood alcohol. Despite decades of increasingly wild pissups.
Ok, I realise that it's meant to be a frivolous statement, but how do you measure the legal limit? I do it on the basis of risk.