Hum Hist 2 ho 16

Hum Hist 2 ho 16 - Hum Hist II Week 9, lecture 2 Energy...

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Hum Hist II Energy revolution, 1945-2011 5/25/11 Week 9, lecture 2 The energy bonanza Explosion of energy in western Europe and its colonies since 1800, globally since 1900 New sources (e.g., oil, nuclear), new forms (e.g., electricity) New uses— increasing application to food production, in 19th century through steam moving food around; in 20th century through oil-powered tractors, synthetic fertilizers (Haber Process, 1909) In US, 80x as much energy applied per farmed acre in 2000 as in 1900; output quadruples 30 hours of labor required (on average) per ton of wheat in US in 1800; <2 hours in 1970s >60% of US population farm the land in 1850; 2% in 1975 Biggest impact is Green Revolution in Third World, beginning with Norman Borlaug’s work on drought-resistant wheat in Mexico in 1943, extended by IR8 rice in India Bodies Global population quadruples (1.5bn to 6 bn) in 20th century; food production more than quadruples Bodies get bigger: adult stature increases by 4” in 20th century
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This note was uploaded on 03/06/2012 for the course IHUM 69B taught by Professor Morris during the Spring '11 term at Stanford.

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Hum Hist 2 ho 16 - Hum Hist II Week 9, lecture 2 Energy...

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