My position is not you can't prove it 100%. My position is that the physics and the data do not at all support anything more than a fraction of a degree rise in global temperature. The concentration of CO2 in the atmosphere has increased by 0.01% over the last 300 years from 0.03% and 0.04%. The science tells me that that extra 0.01% of CO2 cannot absorb enough energy to have a measureable effect on the temperature of the atmosphere. I agree that there is probably a very small rise in global temperature, but it is too small to be detectable. After all of these years of global warming, the coldest temperature ever recorded on earth was in 2015. That was the same year that the ship carrying the climate change supporters to Antarctica got stuck in the thick ice, and the rescue ice-breaker ship also got stuck in thick ice. We have recently seen growth in Arctic ice as well. This tells me there is no global warming crisis. But you can believe what you want.