h+e, food 2011
DESCRIPTION
Slides from H+E 2011TRANSCRIPT
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Food
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What food isA drastic oversimplification
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Plant growthlight + water + air+ other nutrients
Animal growthwater + nutrients
(soil)
(plants or animals)
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Figure 38.9
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Food
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Food?
http://en.wikipedia.org/wiki/Twinkies
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Food?
http://www.bbc.co.uk/dna/h2g2/alabaster/A516836
• Enriched Wheat Flour • Sugar • Corn syrup • Water • High fructose corn syrup • Vegetable and/or animal shortening • Dextrose • Whole eggs • Modified corn starch • Cellulose gum • Whey • Leavenings • Salt • Cornstarch • Corn flour • Corn syrup solids • Mono and diglycerides • Soy lecithin • Polysorbate 60 • Dextrin
enriched with ferrous sulphate (iron), B vitamins (niacin, thiamine mononitrate [B1], riboflavin [B12] and folic acid).
containing one or more of partially hydrogenated soybean, cottonseed or canola oil, and beef fat.
(sodium acid pyrophosphate, baking soda, monocalcium phosphate)
• Calcium caseinate • Sodium stearol lactylate • Wheat gluten • Calcium sulphate • Natural and artificial flavours • Caramel colour • Sorbic acid (to retain freshness) • Colour added (yellow 5, red 40)
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The Historical Importance of Agriculture
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ConnectionsBBC, 1978
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Food Access
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Urban Food Deserts
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“...a neighborhood in which residents typically must travel twice as far to reach the closest supermarket or local grocer as people in better-appointed neighborhoods...”
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Food Waste
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96,000,000,000pounds of food disposed of every year in the US
FoodPolitics
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“The US wastes 40% of all food produced per year.”
GOOD.ishttp://www.good.is/post/the-u-s-wastes-40-percent-of-all-
food-produced-per-year-how-about-we-stop-doing-that/
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Environmental Impact
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“We must recognize that our food production system was conceived in different times;
what worked then is inadequate, even
dangerous, now.”
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“...our food production system remains structurally blind to ecological and
social imperatives. Designed to create wealth and distribute cheap food, the system has been slow to factor in its responsibilities for the health of the land and the people.”
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“...on a global basis
Agriculture is the largest threat to biodiversity and ecosystem functionof any single human activity.”
United Nations Millennium Ecosystem Assessment
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Why does biodiversity matter?
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Ecosystem Services
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PollinationPredation of pestsDecompositionStabilization of soilNitrogen fixation
SustainingLife
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Resilience
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Reduction of Genetic Diversity
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livestock production based on 15 mammal and bird species
food supply based on 12 plant species
90%
75%
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http://www.wired.com/magazine/2010/02/ff_ug99_fungus/
Stem Rust
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Gene flow from cultivarsto wild species
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Pollution
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Eutrophication
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http://en.wikipedia.org/wiki/algal_bloom
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Habitat Destruction
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Land Degradation
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wind and water erosion
soil salinization
soil habitat disturbance
due to flood irrigation
due to removal of vegetative coverand pulverization of soil by tillage, livestock and machinery
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Eat local, save your foodshed
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“Foodsheds are the farmbelts around our cities that once provided most urban food.”
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Saving local foodsheds- preserves an area’s• agriculture land• traditions• varietal crops
- increases an area’s• resilience• quality of life
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Further Reading
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