Richard Tol resigned from the Intergovernmental Panel on Climate Change (IPCC) because their latest report was too alarmist. His action proves that the latest IPCC Report (AR5) raised the level of alarmism without justification. He complained about the problem back in 2010 in a guest post for Roger Pielke’s Jr, but did nothing. Apparently they crossed some threshold of alarmism that scared adherents.