In existographies, Paul Ehrlich (1932-) (CR:9) is an American biologist noted for []

Overview
In 1977, Ehrlich, in his chapter “Availability, Entropy, and the Laws of Thermodynamics”, co-written with Anne Ehrlich and John Holdren, superficially discusses the high-grade (availability) low-grade (non-availability) interpretation of energy forms, e.g. stored energy in gas, versus room temperature heat. [1]

In 2008, Ehrlich, in his The Dominant Animal: Human Evolution and the Environment, stated that the best-known effect of the second law is its functioning in the steps of the food chain, to the effect that in each step up the food chain energy is degraded, or something along these lines. [2]

Quotes | By

The following are quotes by Ehrlich:

“One wonders if Simon could not at least find a junior high school science student to review his writings?”
— Paul Ehrlich (1981), Publication; cited in: Simon (1990); Simon (1991) [3]

References
1. Ehrlich, Paul R., Ehrlich, Anne H., and Holdren, John P. (1977). “Availability, Entropy, and the Laws of Thermodynamics”, Ecoscience. W.H. Freeman and Co.; in: Valuing the Earth: Economics, Ecology, Ethics (ch. 2, pgs. 69-74). Ed. Herman Daly, Kenneth Townsend. MIT Press.
2. Ehrlich, Paul R. and Ehrlich, Anne H. (2008). The Dominant Animal: Human Evolution and the Environment (food-chain, pg. 183; thermodynamics, 10+ pgs). Publisher.
3. Simon, Julian. (1991). “Entropy and Energy Accounting: are They Relevant Concepts?” (Ѻ), Entropy, Jan 15.

External links
● Paul R. Ehrlich – Wikipedia.