John Holdren is an American scientist and policy advisor who is known for his work in the fields of environmental science, climate change, and science policy. He served as the Director of the Office of Science and Technology Policy (OSTP) in the Obama Administration from 2009 to 2017. In this role, he was instrumental in advising the President on various science and technology issues, including climate change policy.
Articles by others on the same topic
John Holdren and Paul R. Ehrlich analyzed environmental impact by separating the number of people from impact per person. Their 1971 paper writes an opening decomposition of the form , while allowing the per-person factor to depend on population size. The identity becomes predictive only when that factor is measured or modeled. This makes the assumptions visible when comparing changes in the number of people with changes in resource pressure per person, without presuming that the two factors vary independently.[ref]
Impact of Population Growth by Paul R. Ehrlich and John P. Holdren. 1971 paper, opening population-times-per-capita-impact decomposition
Portrait of John Holdren
. Office of Science and Technology Policy, official portrait, 24 April 2009. Public domain in the United States: OSTP employee’s official-duty federal-government work. Source usage terms, via Wikimedia Commons. Source.