Kesten C. Green, University of South Australia, is the Director of forecastingprinciples.com. J. Scott Armstrong, University of Pennsylvania, is editor of the Principles of Forecasting: 'The IPCC and its supporters promote these scenarios as if they were forecasts. Scenarios are not, however, the product of evidence-based forecasting procedures...Astonishingly, given the expensive policies proposed and implemented in the name of “climate change,” we are aware of only one published peer-reviewed scientific paper that claims to provide long-range climate forecasts. The paper is our own 2009 article in the International Journal of Forecasting...The findings strengthen our conclusions that there are no scientific forecasts of dangerous global warming. Without scientific forecasts, the alarm is false. Government programs, subsidies, taxes, and regulations put up as responses to the global warming alarm can only result in wasteful misallocations of valuable resources. Is it surprising that the government would respond to an alarm lacking scientific support? In our study of situations that are analogous to the current alarm over scenarios of global warming we identified 26 earlier movements based on scenarios of manmade disaster, including the global cooling alarm in the 1960s. None of them were based on scientific forecasts. Yet governments imposed costly policies in response to 23 of them. In no case did the forecast of major harm come true.'