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Unformatted text preview: Why use of GMOs?
Because yields achieved through
conventional agricultural techniques will:
not increase significantly in the future Global area of biotech crops Agriculture as an Ecological Process • Subsistence Farming: production of food is intended
satisfy the needs of the farm
household • Less energy-intensive Per united of food produced: 10x less energy needed Irrigation
• 70% of freshwater withdrawals
Up to 90% in developing countries Up to 5,000L/day/person
1,000L for 1 tonne of grain Canada 75% in the prairies Rise of the Chemicals
• Fertilizers and biocides: important inputs to modern
Canada: 54 kg/ha
U.S.: 103 kg/ha
Japan: 301 kg/ha Chemical input usage in
farming in Canada,
1971–2005 Trends in Meat Consumption • Eating at the: highest level on food chain
• Not an effective energy transfer Developed: 85 kg/person/year
Developing: 32 kg/person/year • The Livestock Revolution
Shift from family farms to: to: factory farms/feedlots Canada: 43% of world's beef
Canada: 50% of world's poultry
2005: The Livestock Revolution (2) • Concerns over impacts of having so many
animals: concentrated in small areas Ontario/Quebec: 10,000 animals per farm...
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- Spring '14