Grandes números planeta / vida
Relaciones y visualizaciones biomasa global, tecnosfera, superficie terrestre, marítima...?
Purdy _ no cita fuente... :-/ en: https://www.theatlantic.com/ideas/archive/2018/07/trumpian-nativism-is-transforming-the-american-landscape/564026/
One serious estimate puts the mass of the global “technosphere,” the material habitat that humans have created for themselves in the form of roads, cities, rural housing, the active soil in cropland, and so forth, at thirty trillion tons, five orders of magnitude greater than the weight of the human beings that it sustains. That is approximately four thousand tons of transformed world per human being, or 27 tons of technosphere for each pound of a 150-pound person. The world we make tells us how to live in it. If you want to stay cool in the summer and warm in the winter, communicate with others, work, feel yourself a part of the cultures in which you share, here is what you must do: enter onto these roads and rails and flights routes, tap into these power grids and data networks, use these tools infused with rare earths.
- Total weight of "technosphere:" 30 trillion tons (30 billones de toneladas)
- roads, cities, rural housing, the active soil in cropland, and so forth
- 5 órdenes de magnitud mayor que el peso de los humanos que sostiene (5 órdenes: si humanos es 1, tecnosfera sería 100.000? _ no parece estar mut bien...??)
- 4.000 toneladas de mundo transformado por humano
- 27 toneladas por cada pound de una persona de 150 pounds
