Apocalypse in 2070...or earlier
Mar. 21st, 2004 08:23 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
openspace4lifeIf you've watched the movie Advertising and the End of the World and were confused by the graph showing the curves representing "natural resources" and "production" intersecting in about the year 2070, here's an explanation.
"Probably the best index of the scale of the human economy as a part of the biosphere is the percentage of human appropriation of the total world product of photosynthesis. Net primary production (NPP) is the amount of energy captured in photosynthesis by primary producers, less the energy used in their own growth and reproduction. NPP is thus the basic food resource for everything on earth not capable of photosynthesis. Vitousek et al. calculate that 25% of potential global (terrestrial and aquatic) NPP is now appropriated by human beings (BioScience 1986 vol. 34, no. 6, pp. 368-73). If only terrestrial NPP is considered, the amount rises to 40%. The definition of human appropriation underlying the figures quoted includes direct use by human beings (food, fuel, fiber, timber) plus the reduction from potential NPP due to alteration of ecosystems caused by humans. The latter reflects deforestation, desertification, paving over, and human conversion to less productive systems (such as agriculture). Taking the 25% figure for the entire world, it is apparent that two more doublings of the human scale will give 100%. Since this would mean zero energy left for all nonhuman and nondomesticated species, and since humans cannot survive without the services of ecosystems, it is clear that two more doublings of the human scale would be an ecological impossibility, even if it were arithmetically possible. Assuming a constant level of per capita resource consumption, the doubling time of the human scale would be equal to the doubling time of population, which is on the order of 40 years."
1986 + 40*2 = 2066, which is close to 2070. But wait, there's more.
"Of course economic development currently aims to increase the average per capita resource consumption and consequently to reduce the doubling time of the scale of the human presence below that implicit in the demographic rate of growth. Furthermore the terrestrial figure of 40% human appropriation is really the more relevant one since we are unlikely to increase our take from the oceans very much. Unless we awaken to the existence and nearness of scale limits, then the greenhouse effect, ozone layer depletion, and acid rain will be just a preview of disasters to come, not in the vague distant future but in the next generation."
-Herman E. Daly and John B. Cobb, Jr., For the Common Good.
For some idea of what such a future might be like, see the novel A Friend of the Earth by T. C. Boyle.
"Probably the best index of the scale of the human economy as a part of the biosphere is the percentage of human appropriation of the total world product of photosynthesis. Net primary production (NPP) is the amount of energy captured in photosynthesis by primary producers, less the energy used in their own growth and reproduction. NPP is thus the basic food resource for everything on earth not capable of photosynthesis. Vitousek et al. calculate that 25% of potential global (terrestrial and aquatic) NPP is now appropriated by human beings (BioScience 1986 vol. 34, no. 6, pp. 368-73). If only terrestrial NPP is considered, the amount rises to 40%. The definition of human appropriation underlying the figures quoted includes direct use by human beings (food, fuel, fiber, timber) plus the reduction from potential NPP due to alteration of ecosystems caused by humans. The latter reflects deforestation, desertification, paving over, and human conversion to less productive systems (such as agriculture). Taking the 25% figure for the entire world, it is apparent that two more doublings of the human scale will give 100%. Since this would mean zero energy left for all nonhuman and nondomesticated species, and since humans cannot survive without the services of ecosystems, it is clear that two more doublings of the human scale would be an ecological impossibility, even if it were arithmetically possible. Assuming a constant level of per capita resource consumption, the doubling time of the human scale would be equal to the doubling time of population, which is on the order of 40 years."
1986 + 40*2 = 2066, which is close to 2070. But wait, there's more.
"Of course economic development currently aims to increase the average per capita resource consumption and consequently to reduce the doubling time of the scale of the human presence below that implicit in the demographic rate of growth. Furthermore the terrestrial figure of 40% human appropriation is really the more relevant one since we are unlikely to increase our take from the oceans very much. Unless we awaken to the existence and nearness of scale limits, then the greenhouse effect, ozone layer depletion, and acid rain will be just a preview of disasters to come, not in the vague distant future but in the next generation."
-Herman E. Daly and John B. Cobb, Jr., For the Common Good.
For some idea of what such a future might be like, see the novel A Friend of the Earth by T. C. Boyle.
