- Theyellowcolourseeninsomeautumntreesresultsfromthelossofchlorophyllsimplyunmaskingtheyellowcarotinoidsthatwerethereallalong.Whetherthis"ageofman"willbeshortorlongisunknown,saysCrutzen,whosharedhisNobelforunmaskingtheman-madechemicalseatingawayatthe...
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