Brass, you are incorrect. The rates of change are exponentially higher than in the past. CO2 is now higher than at any point in human evolution, and the change has taken less than 200 years. Deniers like you will be seen with gape-mouthed incredulity by the sufferers in the future, much like we regard the nice English gentleman who released rabbits in Australia because he liked to hunt them. Only this time it’s on a global scale, with billions of deaths.