I am skeptical humans are the main cause of climate change and that it will be catastrophic in the near future. There is no scientific proof of this hypothesis, yet we are told “the debate is over” and “the science is settled.”
My skepticism begins with the believers’ certainty they can predict the global climate with a computer model. The entire basis for the doomsday climate change scenario is the hypothesis increased atmospheric carbon dioxide due to fossil fuel emissions will heat the Earth to unlivable temperatures.
In fact, the Earth has been warming very gradually for 300 years, since the Little Ice Age ended, long before heavy use of fossil fuels. Prior to the Little Ice Age, during the Medieval Warm Period, Vikings colonized Greenland and Newfoundland, when it was warmer there than today. And during Roman times, it was warmer, long before fossil fuels revolutionized civilization.
The idea it would be catastrophic if carbon dioxide were to increase and average global temperature were to rise a few degrees is preposterous.
By its constitution, the IPCC has a hopeless conflict of interest. Its mandate is to consider only the human causes of global warming, not the many natural causes changing the climate for billions of years. We don’t understand the natural causes of climate change any more than we know if humans are part of the cause at present. If the IPCC did not find humans were the cause of warming, or if it found warming would be more positive than negative, there would be no need for the IPCC under its present mandate. To survive, it must find on the side of the apocalypse.