Hermeneutica da queda duma árvore no meio da floresta

Um vulcão ou uma explosão nuclear são capazes de derrubar uma floresta inteira, enquanto uma tempestade ou um nevão apenas são capazes de arrancar do chão algumas árvores. O furacão Sandy derrubou mais de 8000 árvores em Nova York e mais uns tantos milhares nos arredores.

“The first thing to know is that all trees have the potential to fail at some level of force from wind, snow, ice, either singly or in combination. One main reason, all three experts agree, is the phenomenon known as “windthrow” which uproots a tree.  The tree trunk acts as a lever and so the force applied to the roots and trunk increases with height. Taller trees are more susceptible to windthrow. The roots of trees can extend 1-2.5 times the radius of the branches and many urban areas do not allow this extensive development, the problem lies mostly with trees that have been developed around and had roots cut, crushed or torn in the process. There may be ensuing decay.” Este e outros pormenores sobre a árvore e a floresta podem ser lido na Scientific American.

A derrapagem nas receitas do Estado deve-se a «efeitos não lineares de natureza cíclica e/ou efeitos não discricionários». Alguem aqui percebe de árvores?!

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