(1) It would help to have solid evidence that temperature was stable before the start of the industrial revolution and the resulting CO2 from human activity.  So, we&#x27;d have to get rid of the Little Ice Age and the Medieval Warming Period.<p>(2) We would have to get rid of the big temperature changes going back 500,000+ years from the Vostok ice core data that Al Gore plotted and where the CO2 concentrations went up about 800 years after the temperatures went up.<p>(3) It would also help to cancel the global cooling from about 1940 to 1970 while CO2 concentrations were going up.<p>E.g., from these examples, IMHO, the temperature record and the record of CO2 concentrations don&#x27;t support that CO2 concentration changes caused the temperature changes.