> There are no sources in this link

Of course there is, in the very page:

“Researchers who study the Earth's climate create models to test their assumptions about the causes and trajectory of global warming. Around the world there are 28 or so research groups in more than a dozen countries who have written 61 climate models. Each takes a slightly different approach to the elements of the climate system, such as ice, oceans, or atmospheric chemistry.

The computer model that generated the results for this graphic is called "ModelE2," and was created by NASA's Goddard Institute for Space Studies (GISS), which has been a leader in climate projections for a generation. ModelE2 contains something on the order of 500,000 lines of code, and is run on a supercomputer at the NASA Center for Climate Simulation in Greenbelt, Maryland.”

“GISS produced the results shown here in 2012, as part of its contribution to an international climate-science research initiative called the Coupled Model Intercomparison Project Phase Five. Let's just call it "Phase-5."
Phase-5 is designed both to see how well models replicate known climate history and to make projections about where the world’s temperature is headed. Initial results from Phase-5 were used in the 2013 scientific tome published by the Intergovernmental Panel on Climate Change.”

> The case for undeniable physics, which you have not provided a link for, or from the evidence from geologic history, which you have abandoned.

The link is the summary of what calculating which physical formulas gives, as I've quoted. It's you who "doubt" in the "tree rings" and I've given you the context: tree rings are just a small piece of he whole picture, and what we know, including the levels of confidence from that part of science is still good enough to have a good picture of what is happening and what has happened before. But once again: not any single historical proxy is directly used when the physical formulas are applied.

> In the same spirit as your link, here is Leonard Nimoy talking about Global Cooling

That's a joke, right? I'm presenting you the results of the NASA's best computer models, and you are giving me a link to... what actually? Since when are TV shows a proof for anything?

> I'm am saying that what you've shown doesn't prove that increased co2 is going to warm the earth to a significant degree, and the current situation isn't caused by other factors.

And what you are saying is simply untrue. What I've given you is the result of a lot of precise calculations using the physical formulas and the values obtained by all the scientific work we have. And nobody ever has found any meaningful error in the physics we use.

If you don't understand physics, I can imagine that it's hard to you to believe in something you simply don't understand, and I don't know your background to help you. What I can give you is a personal page maintained by one English PhD in Chemistry, Dr Jack Barrett, which was known as the "global warming skeptic" in the 90ties (you can Google his name, at the time the other person mentioned on his page was also active in "denying", this other guy was a reasonably famous face in Britain, but also uninformed at then). But then Barrett tried to learn the physical processes, relevant for climate, which he missed while pursuing his career in chemistry. And if you read his newer material, he is now completely convinced that the physics is absolutely valid and confirming the warming:

http://www.barrettbellamyclimate.com

Everybody who has enough knowledge to be able to check the formulas and who has enough integrity to admit what he didn't know, and who doesn't have some hidden agenda would have to come to the same conclusion. Read the pages on his site. It's the most honest outcome of a former "doubter" I know of. There are still some "old" page from the time when he "was not convinced" but if you are really interested in the formulas and science behind all this, you will find enough there, I believe he updated most of his site to that what he knows and understands now (edit: I've checked, he still just updates the "news" pages, i.e: http://www.barrettbellamyclimate.com/page4.htm and http://www.barrettbellamyclimate.com/page5.htm )

It's about the formulas and measurements. Note: I'm not saying "take that guy as a reference." I'm saying: he's the guy who didn't know enough but was willing to learn and made enough notes, so if you are actually interested in some formulas "for beginners" you can find them there. If you'd want something even "more serious"... you'd need at last university level material, which of course exists too...