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Well we've got Co2 sorted. You can put it in a bottle shine radiation in one end and see what gets through. And your absorption spectrum can be checked by other scientists in their own little lab.
Then it gets a little complicated. The wavelengths that interact with Co2 rattle around the atmosphere until a photon is sent off from high enough up that it escapes into space without colliding with another Co2 molecule. But with more Co2 that's now higher up where it's colder so photons are slow off the mark. So now there's more solar energy coming in than reflected/re-radiated energy going out. So earth heats up from below to try and re-establish equilibrium. Heat in has to equal heat out in the long run.
Then it gets more complicated. A little heat ramps up the hydrological cycle. More clouds. Are they high clouds or low clouds? And then rainfall causes more erosion and nutrients run off into the ocean, aiding Co2 uptake. Or maybe with more rain there is more vegetation and erosion slows down? And then with all the air conditioners going flat out a new virus emerges that shuts down aviation. How much heat is reflected by contrails?
Whatever happened to Gaia? She doesn't seem to get much of a mention these days.
en.wikipedia.org/wiki/Gaia_hypothesis
"The Gaia hypothesis posits that the Earth is a self-regulating complex system involving the biosphere, the atmosphere, the hydrospheres and the pedosphere, tightly coupled as an evolving system. The hypothesis contends that this system as a whole, called Gaia, seeks a physical and chemical environment optimal for contemporary life.[13]"
Yep, it's complicated. Yep, one can agree that there may be less than 100% certainty about the effects. No issue; I enjoy discussing things with you because you are smart, educated and reasonable and give us food for thought.
If we take action and the science is wrong - and IMHO that is highly unlikely - we will have spent a lot of money cleaning up the earth. If we take action and the science is right, we'll have saved ourselves from catastrophe. If we take no action and the science is right, we'll suffer much more. Arguably it's like our mechanic telling us that the timing belt may fail, or our doc telling us to take anti cholesterol medication - yes maybe the experts are wrong and we can get by without fixing the apparent problem, but is that sensible?
Australia is just about the richest country that has ever existed in the history of mankind. Take a look around Sydney Harbour - the boats are vastly bigger than they were a few years ago because of the amount of money going to the top 20% and top 5%, and to many of the others. We can't pretend we are too poor to play a leading role.
The fact that there's a small chance the climate science consensus is not totally correct does not mean that the stupid arguments such as the claim that we shouldn't believe "models and calculations" or "the climate scientists who earn less than most people in the fossil fuel industry are in it for the money" are anything but ludicrous. It doesn't mean that we have to listen to abusive conspiracy whackos, and it doesn't mean that the abusive people who swallow and repeat lies about "climate warriors getting stuck in the ice" without doing a shred of checking shouldn't be called on their gullibility and hate - especially when that contempt is thrown at a bunch of people who weren't even "climate warriors".
Here's one glaring example of what drives the sceptics:
Ol Boris Johnson stated that by 2035 (15 years time) the UK will no longer allow new petrol/diesel/hybrid motor vehicles to be sold in the UK. ( so far he hasn't Scotland, Wales or Northern Ireland on side yet)
Overnight Tesla shares jump 40 odd percent 
Now who would be on that bandwagon of share increase in wealth one would ask.
Who had a reasonable share portfolio of Tesla shares well prior to that announcement . ?
Had extended business interest, purchase a bunch of shares prior to the announcement. ?
The biggest issue with bullcrap policy's such as his claim, is the goal is well stated, however, the road map "how" is never clear and usually a load of hot air.
The mainstream media is running about menzeling Boris's tyres, and completely ignoring no road map stated. 
That's not what is driving Tesla stock up
www.smh.com.au/business/companies/why-tesla-s-share-price-has-jumped-36-per-cent-in-two-days-20200205-p53xup.html
It boils down to good old irrational optimism and gambling on stock prices
And Boris Johnson, like Bill Shorten before the election is only stating what looks to be the future of cars. In Australia's case a target of 50% battery cars looked likely by 2030 just because Asia and Europe are heading that way and they make the cars that we buy. Johnson might legislate it, and that gives the car and fuel industry 15 years to adjust.
Many people would only bring up the shares if there was an implication there was insider trading going on.
FWIW as a former corruption investigator, I'd think that any such corruption would relate to a lower-profile decision. There are many decisions made very quietly or routinely that offer scope for corruption of various forms.
A quick google search is all that is needed to win free tickets. CERN .
It does make you wonder. If something as simple as a dripping tap goes into weird modes of oscillation why wouldn't the climate?
