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PPD132 /ESS 182 Sustainable Development 2 Spring 2010. LECTURE2: SUSTAINABLE FOOD SECURITY Matthew. Overview. Guest Lecture: Dr. Bryan McDonald and Kelsey Meagher Next Class Landscape: The Dust Bowl Group Projects. Next Class. Back in DBH 1600. Landscape: The Dust Bowl.

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ppd132 ess 182 sustainable development 2 spring 2010

PPD132 /ESS 182Sustainable Development 2Spring 2010

LECTURE2:

SUSTAINABLE FOOD SECURITY

Matthew

overview
Overview
  • Guest Lecture: Dr. Bryan McDonald and Kelsey Meagher
  • Next Class
  • Landscape: The Dust Bowl
  • Group Projects
next class
Next Class
  • Back in DBH 1600
landscape the dust bowl1
Landscape: The Dust Bowl
  • Severe dust storms from 1930-1940 affecting 100 million acres in Colorado, Texas, Oklahoma, Kansas and New Mexico severely, but all of the US and Canada to some extent
  • Caused by natural drought and unsustainable agriculture
  • Following Civil War, Homestead Act encouraged people to settle in Great Plains
  • Technology enabled rapid expansion of farming, but practices (e.g. burning stubble to weed land) increased vulnerability to erosion
landscape the dust bowl2
Landscape: The Dust Bowl
  • Unusual rains encouraged more settlement and farming in the years prior to 1930
  • Severe drought struck in 1934
  • Dust clouds covered Chicago and blew into Boston, NY and Washington
  • 500,000 Americans became homeless
  • 2.5 million moved
landscape the dust bowl3
Landscape: The Dust Bowl
  • 200,000 environmental refugees fled to California –but found few economic opportunities because this coincided with the Great Depression
  • Great Depression started in US in 1929, lasted into 1940s
  • Causes: bad financial decisions—or bad policy decisions in the face of a recession-- leading to bank failures and stock market crash (Black Tuesday)
  • Major dust storms: Sahel since 1960s; Australia 2009; China since 1960s; fear of recurrence in US
landscape the dust bowl9
Landscape: The Dust Bowl
  • http://www.youtube.com/watch?v=x2CiDaUYr90
  • http://www.youtube.com/watch?v=KEYb9xjAhHI&feature=related
  • http://www.youtube.com/watch?v=0PX9CwwOx_U&NR=1