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Supertopics:
Things Made with Petroleum
Agricultural Inputs

Fertilizer

Subtopics:
webBarbara PleasantMother Earth News2010-10-01
webSteve SolomonMother Earth News2006-06-01
webGrowAnything.com2015-12-04
webLindsey KonkelEnsia2018-02-05
webFiona HarveyThe Guardian2016-05-17
webAnne Bikle & David R. Montgome...Nautilus2016-03-31
webSara RubinAl Jazeera2014-12-25
webScienceDaily2014-08-31
webRichard HarrisNPR2009-08-28
webAri LeVauxAlterNet2016-04-02
webAngela Delli SantiAssociated Press2007-04-01