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  • ...t=Lexi|title=The World on Fire|publisher=NOVA online - Public Broadcasting System (PBS)|accessdate=2009-07-13|date=June 2002|url=http://www.pbs.org/wgbh/nova ...concentrations of sooty particles could increase absorption of incoming [[solar radiation]] during winter months by as much as 15%.<ref>{{vancite conferenc
    88 KB (12,641 words) - 21:35, 20 September 2010