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VI. Par#rapport#au#taux#naturel#d’extinction#des#espèces#défini#par#les#scientifiques,#le#taux#
actuel#est#:#
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VII. A#quel#rang#mondial#se#situe#la#France#en#nombre#d’espèces#menacées#?#
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VIII. Si#la#pollution#d’origine#humaine#tue#tous#les#insectes#
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IX. Au#niveau#mondial,#combien#d’hectares#(1#hectare#=#10#000#m2)#de#forêt#sont#perdus#
chaque#année#depuis#2000#?#
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