20 de novembro de 2009

Mais um "Pico": "Pico de solo arável"


"At the Carbon Farming conference in Australia earlier this month, speakers pointed to a problem that has worried environmentalists for about a decade: peak soil. China is losing soil 57 times faster than nature can replace it, [...].  In the United States, conservation practices have helped reduce soil loss, but top soil is still being eroded 10 times faster than it can be replaced, according to the National Academy of Sciences. This is a concern, not only because it limits the amount of food-producing land, but also because soil and the crops that grow in it can help sequester carbon, so the more of it we lose, the more carbon we leave out in the atmosphere."

E existe um problema semelhante nos Açores, embora não saiba do seu grau de virulência - O Professor Farrica referiu o assunto numa aula de sapiência, na Universidade dos Açores, nos primeiros anos da década de 90, mas não me recordo dos pormenores.

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