huit six 10 Posted December 8, 2009 Partager Posted December 8, 2009 Switch off lights! Leave your 4×4 at home! This may help, but the magnitude of global warming forces scientists to think big. They want to filter sunlight by positioning a trillion sunshades in space; launch fleets of robot ships spraying water into the atmosphere; fertilize carbon-absorbing plankton by dumping tons of iron into the oceans. Massive interventions such as these are proposed and critically assessed in a Theme Issue of the Society's Philosophical Transactions. They may be risky, but could become less risky than doing nothing. In a scene-setting paper, James Lovelock outlines his idea for stimulating blooms of algae that sequester carbon dioxide to the ocean floor. He emphasizes the extreme dangers of climate change, drawing on parables from simple models such as ‘daisy world’. Stocked with competing species of black daisies (absorbing the Sun’s heat) and white daisies (reflecting sunlight), this world evolves in ways similar to that of Earth. He ends with ethical advice. We should focus less on ‘human rights’ and more on ‘human obligations’ to preserve the biodiversity of Gaia, our living planet. Michael Thompson, Dept of Applied Mathematics & Theoretical Physics, University of Cambridge. Citer Link to post Share on other sites
momoha2000 10 Posted December 14, 2009 Partager Posted December 14, 2009 Switch off lights! Leave your 4×4 at home! This may help, but the magnitude of global warming forces scientists to think big. They want to filter sunlight by positioning a trillion sunshades in space; launch fleets of robot ships spraying water into the atmosphere; fertilize carbon-absorbing plankton by dumping tons of iron into the oceans. Massive interventions such as these are proposed and critically assessed in a Theme Issue of the Society's Philosophical Transactions. They may be risky, but could become less risky than doing nothing. In a scene-setting paper, James Lovelock outlines his idea for stimulating blooms of algae that sequester carbon dioxide to the ocean floor. He emphasizes the extreme dangers of climate change, drawing on parables from simple models such as ‘daisy world’. Stocked with competing species of black daisies (absorbing the Sun’s heat) and white daisies (reflecting sunlight), this world evolves in ways similar to that of Earth. He ends with ethical advice. We should focus less on ‘human rights’ and more on ‘human obligations’ to preserve the biodiversity of Gaia, our living planet. Michael Thompson, Dept of Applied Mathematics & Theoretical Physics, University of Cambridge. une traduction pour mieux comprendre le sujet: Éteignez les lumières! Laissez votre 4 × 4 à la maison! Mai de cette aide, mais l'ampleur du réchauffement de la planète les forces scientifiques de voir grand. Ils veulent filtrer la lumière du soleil en plaçant un billion de parasols dans l'espace; lancer des flottes de vaisseaux robot de pulvérisation d'eau dans l'atmosphère; fertiliser le plancton absorbe le carbone par le dumping de tonnes de fer dans les océans. Interventions massives comme celles-ci sont proposés et une évaluation critique dans un numéro thématique des Philosophical Transactions de la Société. Ils mai être risqué, mais pourrait devenir moins risqué que ne rien faire. Dans une scène du papier décor, James Lovelock expose son idée de stimuler la prolifération d'algues qui séquestrer le dioxyde de carbone vers les fonds océaniques. Il souligne les dangers extrêmes du changement climatique, en s'appuyant sur des paraboles de modèles simples tels que «monde marguerite». Stock en concurrence avec des espèces de marguerites noire (absorbant la chaleur du soleil ») et des marguerites blanches (qui reflète la lumière du soleil), ce monde évolue de façon similaire à celle de la Terre. Il termine par des conseils d'ordre éthique. Nous devrions nous concentrer moins sur les «droits humains» et plus encore sur les «obligations de l'homme à préserver la biodiversité de Gaïa, notre planète vivante. Citer Link to post Share on other sites
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