That the earth is heating up is incontrevertible. It is. What's being debated is why. There are two main theories. The 'Grand Coincidence Theory'. That the earth is heating 'just because', with no mechanism, no causation, no explanation. And just happens to be heating at an enormous rate at the *exact* same time we're pumping carbon dioxide into the atmosphere at enormous rates.....by pure coincidence. Or that Humans are causing climate change through CO2 emissions. Where we can chart rising temperatures AND rising CO2 levels. And in real time, measure the higher amounts of infra-red radiation being emitted by carbon dioxide in our atmosphere specifically, with those amount of Infra-red radiation rising as the CO2 levels rise. With a mechanism, explanation, mountains of evidence and no need for a grand coincidence. The 'Grand Coincidence' theory is just an awful explanation of events. The CO2 Climate Change models are much more fact based and a vastly superior explanation of events.