First, there is the known heat retaining properties of CO2 and other greenhouse gases. This results from the gases being transparent to visible light but opaque to infrared radiation (a.k.a. heat). If you think that is a falsehood, do your own experiments with samples of CO2 to prove it does not retain heat. The scientists who established the greenhouse effect and later connected it to the concept of global warming were Joseph Fourier in 1824, John Tyndall in 1858, and Svante Arrhenius in 1896. Now, if you think you can debunk all the work those three did so long ago, knock yourself out.
Second, there is the confirmation of the greenhouse effect going to extremes on a planetary scale, with the Soviet Venera probes sent to the planet Venus in the 1960s. If you think all that data the probes sent us was faked, prove it!
Then there is the recorded increase in CO2 levels since the 1950s. Can you prove that such an increase never happened?
Then there is the solar output over that same period.
Then there are the temperature measurments around the globe over the same period. They fit the increasing CO2 levels better than they fit the solar output levels.
Or maybe you think that burning fossil fuels somehow does not produce CO2. OK, take samples of coal, oil, gasoline, and natural gas and burn them and see how much, if any, CO2 they produce.
Or maybe you think that the Industrial Revolution of the 19th Century and/or the population growth of the past few centuries never happened and that we humans were somehow created thousands of years ago (or maybe even less than a century ago) at our present level of six billion and with all our fossil fuel burning industrial, transportative, and energy generative processes all intact and running. My G_d, even the Young Earth Creationists, wedded to Biblical dogmas, are not that insane! BTW, charts depicting the world’s population growth resemble…….A HOCKEY STICK!!!!
The Industrial Revolution, the growth of the world’s population, AND the known properties of CO2 AND the known effects of burning fossil fuels in turn support the hockey stick graphs of global temperatures you so revile as fraudulant, just because Stephen McIntyre says so and dozens of his allies in the media repeat his claims all over the place. What, is he some prophet or even a demigod whose sacred word may not be questioned lest ye be charged with blasphemy?
So, yes, there is clear and overwhelming evidence for the man-made global warming hypothesis!