an article published in 2000 and cited 19,000 times by 2017) that these hotspots should be the focus of preservation efforts as a way to cut the rates of mass extinction and this strategy has been adopted by global conservation organisations raising hundreds of millions of dollars to date – by some estimates the largest amounts ever assigned to a single conservation strategy. He wrote an influential book "Ultimate Security: The Environmental Basis of Political Stability" that was an early contribution to the field of environmental security and how environmental factors influence local and international politics. Together with Jennifer Kent, he wrote Perverse Subsidies (published in 1997 by the International Institute for Sustainable Development; rev. edition, 2001) that highlighted how large-scale government intervention in the form of subsidies, both direct and indirect, can lead to adverse rather than beneficial effects on society and the environment. Also in 1997, he published Environmental Refugees, warning that there might be 50 million environmental refugees by 2010 "if not before." He ceased most academic work towards the beginning of the 2010s. Criticism Myers's widely cited work on 'climate refugees' has been criticised by social scientists, and migration scholars in particular. Professor Myers himself admitted that his estimates, although calculated from the best available data, required some "heroic extrapolations", In April 2011, the UN was reported to have distanced itself from Myers's forecasts in 2005 that the total number of climate refugees would reach 50 million by 2010. One academic has stated that "my understanding is that Norman Myers looked at a map of the world, and he said which are the hotspots that we think are going to be affected by climate change; then he looked up the projected populations for those areas in 2010 and 2050 and added them up.... That's how he got to such a figure, because he didn't take into account that some people wouldn't move." Populations continue to rise in many regions, with one effect being attempts at migration. Other estimates place the number of climate refugees in the tens of thousands. Honours Blue Planet Prize (1991) Volvo Environment Prize (1992) Pew Fellow in Environment (1994) Foreign Associate, US National Academy of Sciences (1994) UNEP Environment Prize, Sasakawa Award (1995) Companion (CMG), Order of St. Michael and St. George, Queen's Honours (1998) Honorary doctorate, University of Kent (2003). Fellow, American Association for the Advancement of Science Fellow, World Academy