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| | Steady-State Economics, by Herman Daly |
 | | Young ecosystems (and cowboy economies) tend to maximize production efficiency, that is, the ratio of annual flow of biomass produced to the preexisting biomass stock that produced it. |
 | | He calculates what has happened to the productivities of a number of particular resources between 1950 and 1970 and finds that some (iron, manganese, copper, lead, zinc, bituminous coal) have increased, while the productivities of others (nickel, petroleum) have remained the same and those of still others (aluminum, natural gas, electric power, columbium) have fallen. |
 | | The idea of economic growth overcoming physical limits by angelizing GNP is equivalent to overcoming physical limits to population growth by reducing the through put intensity or metabolism of human beings. |
| dieoff.org /page88.htm (9632 words) |
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