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The Natural History of Nitrogen Fixation - 0 views

mbe.oxfordjournals.org/...541.full

nitrogen fixation history natural D4TC agriculture industrial planetary cycle

shared by Ed Keller on 01 Sep 15 - No Cached

The Haber Process - Nitrogen Fertilizer from the Air - 1 views

www.the-compost-gardener.com/haber-process.html

haber process nitrogen fertilizer air D4TC agriculture industrial planetary cycle

shared by Ed Keller on 01 Sep 15 - No Cached

The Nitrogen Bomb | Agriculture | DISCOVER Magazine - 1 views

discovermagazine.com/...featbomb

the nitrogen bomb magazine D4TC agriculture industrial planetary cycle

shared by Ed Keller on 01 Sep 15 - No Cached

Nasa-funded study: industrial civilisation headed for 'irreversible collapse'? | Nafeez Ahmed | Environment | The Guardian - 2 views

www.theguardian.com/...ible-collapse-study-scientists

D4TC climate change NASA collapse civilization global warming planetary

shared by Ed Keller on 06 Sep 15 - No Cached

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