Tag: dinamica dei sistemi
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Diritti della natura (o Pacha Mama)
Capítulo séptimo Derechos de la naturaleza Art. 71.- La naturaleza o Pacha Mama, donde se reproduce y realiza la vida, tiene derecho a que se respete integralmente su existencia y el mantenimiento y regeneración de sus ciclos vitales, estructura, funciones y procesos evolutivos. Toda persona, comunidad, pueblo o nacionalidad podrá exigir a la autoridad pública…
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Bollire una società
Here is how to boil a frog. Place the frog in a pan of tepid water. Raise the temperature so gradually that the frog does not realize it is being cooked. It may even fall into a stupor, as a person might in a hot bath. Eventually it will die. According to experiments done in…
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Controproducenti
Sadly, malaria is making a comeback in many parts of the Third World, due partly to insecticide-resistant mosquitoes and partly to complacency and political disintegration. Irrigation projects such as dams, reservoirs, and irrigation canals often work well in temperate climates. However, in tropical regions, they may backfire. They create large bodies of stationary water that…
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Acacie, formiche e punti di leva dei sistemi
The researchers were testing different methods of preserving acacia trees on experimental plots in Kenya. Half of the plots were surrounded by fences that excluded herbivores such as elephants and giraffes, while the other half were left open. The thinking was that if herbivores were kept away, at least for a while, the acacia trees—which…
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Abeti, tortricidi e feedback
Tree ring records show that the spruce budworm has been killing spruce and fir trees periodically in North America for at least 400 years. Until this century, no one much cared. The valuable tree for the lumber industry was the white pine. Spruce and fir were considered “weed species.” Eventually, however, the stands of virgin…