Interesting. I am still not convinced though.
Then we can only conclude that you are either ignoring the evidence, do not understand the evidence or are rejecting it for non-scientific reasons.
There was no mention of the myriad of other variables such as, but not limited to:
Earth's non-constant orbit.
Milankovitch cycles are well studied, easily propagated (ie, future effects are well known) and their impact on global warming is taken fully into account.
Where the "original" increase of GHGs came from.
Virtually every molecule of CO2 in our current atmosphere above the 280 ppm present at the beginning of the Industrial Revolution (1750) was produced by the combustion of fossil fuels. If you mean something else by ""original" increase", you will have to explain.
What changes in Earth's mass? And what effect do you believe that would have on global temperature?
The effects of lunar orbit (i.e. it's constant slowing, and therefore coming closer and closer to Earth).
You've got the direction incorrect. The moon is moving further and further away from the Earth. It has been doing so since it formed and thus has no relation to an effect which began in the early 1900s.
Sources of energy not related to the sun.
Which would be what? Other stars? The momentum of the planets? Magic? God? Demons?
Other natural variable not, yet, explained by modern science.
What natural variables do you believe are not yet explained by modern science? Which of these do you believe might be warming the planet and what makes you think so?
In effect what I am questioning is: What indisputable proof is there that this phenomenon could not be possible without man-kind's influence?
There is no "indisputale proof" and there never will be. Proofs are something found in mathematics and logic. There are no proofs in the natural sciences. You're just going to have to get used to it.
Of course I do not refer to "far-fetched" ideas such as, but not limited to, other intelligent life influencing Earth.
But you have already referred to several ideas that have nothing to do with global warming, that could have nothing to do with global warming or that are simply unknown. Just because you're not suggesting alien warfare, do not think you're staying close to mainstream science. You're not.
Is it, indeed, possible that science has yet to discover the real cause?
Of course it is "possible", but the odds of that being the case are infinitesimal.
If that is not, then what evidence is there?
Evidence? Let's see: the anthropogenic origin of all the CO2 added to the atmosphere since 1750. The calculated warming produced by that amount of gas added to the atmosphere matching the observed warming. The strong correlation between CO2 and temperature. The historical correlation between CO2 and temperature (in both directions). The observed increase in the radiative imbalance at the top of Earth's atmosphere. The observed back-radiation from the night sky bearing the spectroscopic signature of CO2. If you'd like to look at some evidence, go to
www.ipcc.ch and pull up "The Physical Science Basis", by the IPCC's Working Group I. There are mountains of evidence supporting that the Earth is warming and the primary cause of that warming is human activity (GHG emissions and deforestation).
Another member suggested phenomena that science has yet to explain any natural causes for. Does this, conclusively prove they are caused by man-kind? No more than me standing in a garage makes me a car.
Man is not credited with global warming because no other cause has been found. Greenhouse warming is a known effect. Numerous other possibilities: changes in clouds, cosmic rays, changes in solar irradiation, changes in ocean circulation, etc, etc, etc have been examined and found wanting. The theory that warming is being caused by human emissions of CO2 methane and other greenhouse gases has never been falsified. It is accepted by almost 100% of the world's climate scientists. It is
widely accepted theory, like many others that none of you think to question.
At one time all natural disasters where thought to be the work of a deity of one type or another, until science discovered that to be false. What would science look like today if those discoveries had not been made simply because it was already decided what the causes where?
Science has concluded that the most likely explanation for the warming observed over the last 150 years is human GHG emissions and deforestation. That conclusion is NOT based on anyone's arbitrary decisions or a lack of evidence for this specific cause. Mountains of properly done science indicate this is the case. An enormous majority of the actual experts in this field accept this conclusion as correct - based on the EVIDENCE.