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22.09.2012, Kommentieren
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„Es war einmal eine Stadt im Herzen Amerikas, in der alle Geschöpfe in Harmonie mit ihrer Umwelt zu leben schienen. (...) Dann tauchte überall in der Gegend eine seltsam schleichende Seuche auf. (...) Es herrschte eine ungewöhnliche Stille. Wohin waren die Vögel verschwunden? (...) Es war ein Frühling ohne Stimmen. (...) Kein böser Zauber, kein feindlicher Überfall hatte in dieser verwüsteten Welt die Wiedergeburt neuen Lebens im Keim erstickt. Das hat der Mensch selbst getan.“ Rachel Carson, "The Silent Spring", 1962
Rachel Carsons Buch „Silent Spring“ wird fünfzig Jahre alt – Kritik am Werk ist nicht ganz unberechtigt
Es ist ein Buch, das die Welt verändert hat: „Silent Spring“, „Der stumme Frühling“, von Rachel Carson.
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17.09.2012, Kommentieren
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Der Schweizerische Nationalpark wird bald hundert Jahre alt – Zeit für eine Bilanz
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26.07.2012, Kommentare (1)
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Erhöhter Kohlendioxidgehalt begünstigt Baumwuchs
Bis Ende dieses Jahrhunderts könnten weite Teile der afrikanischen Savanne zu Wäldern werden. Zu diesem Schluss kommt eine Studie des Biodiversitäts- und Klimaforschungszentrums der Goethe-Universität in Frankfurt, wie es in einem Bericht in der renommierten Wissenschaftszeitschrift «Nature» heisst. Die Modellierung deute darauf hin, dass die Düngung durch den steigenden Kohlendioxidgehalt in der Atmosphäre in ganz Afrika zu einer dichteren Bewaldung führe, so der Studienautor Steven I. Higgins, der an der University of the Witwatersrand und an der University of Cape Town studierte und heute in Frankfurt eine Professur für physische Geografie innehat.
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14.05.2012, Kommentieren
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Die Zahl der Völker geht dramatisch zurück – Parasiten und Insektizide setzen der Honigbiene zu
Es ist ein leiser Tod, in den die Bienen gehen. Erst im Frühjahr fällt den Imkern auf, dass ihre fleissigen Helfer nicht mehr da sind. Einige Honigbienen liegen tot im Stock, doch die grosse Mehrheit hat das Weite gesucht. «Es ist nicht so, dass die Arbeiterinnen Brut und Königin im Stich lassen; eine Palastrevolution sieht anders aus», sagt John Miller, der in zweiter Generation die Miller Honey Farms in Gackle, North Dakota, führt und Herr über eine halbe Milliarde Bienen ist. Die Bienen würden den Stock freiwillig verlassen und in den Selbsttod fliegen – «weshalb das so ist, wissen wir nicht».
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