going green: organic food and you stephanie davis
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Going Green: Organic Food Going Green: Organic Food and Youand You
Stephanie Davis
What is organic?What is organic?
Organic farming means a ban on synthetic fertilizers, pesticides and herbicides
The organic movement embraces other issues as well:
Animal welfare Social justice Energy efficiency Local production and consumption
OverviewOverview
Environmental BenefitsHealth BenefitsEconomic BenefitsDiscussion
Economic IssuesEconomic Issues
Yield Organic production is inherently inefficient 20% lower yield than conventional agriculture 20-40% higher in drought years
High demand Demand has increased 20% each year for the last 5
years Because of demand and high prices, worries about
cheating/fraud
Economic IssuesEconomic Issues
StandardsVary widely by country
Can’t replace conventional agriculture completely
Land needs to be taken out of use for crop rotation
Won’t produce enough for animals as well as people
Economic IssuesEconomic Issues
So it is better economically?Uphill battleDifferent focus than conventional agricultureEconomic worth depends on values of
consumers
Health IssuesHealth Issues
Food Quality Protection Act (1996)Health-based safety standards for food
pesticide residues“Reasonable certainty” of no harm (raw and
processed)10x safety factor for infants, childrenLifetime riskEndocrine disruptorsRegistration renewal
Health IssuesHealth Issues
Difficult to compare conventionally-grown food to organically-grown food
Lack of studiesVitamins and minerals
Soil Association study: More Vitamin C and Iron
People in developed countries tend to get enough of these anyway
No other definitive studies
Health IssuesHealth Issues
Other nutritional benefitsSecondary metabolites (anti-carcinogenic)Studies refute benefit
Fertilizers and Pesticides60% of known natural and synthetic
pesticides are carcinogenicUSDA tests random samples for illegal
pesticide use Too much present Illegal application
Health IssuesHealth Issues
Conventional Organic
Residues Present
73-79% 23-27%
Multiple Residues Present
46-62% 6-7%
Residue Levels
66% of the time lower than conventional
Health IssuesHealth Issues
Organic does not mean pesticide-free “Drift” Past use Fraud
Dose-Response: Effects of any given chemical depend on amount exposed to, frequency and length of exposure and toxicity of chemical. Age also plays a role.
Problem lies in finding the lowest level where harm actually occurs
Health IssuesHealth Issues
So is organic food better for health?Government has measures in place to protect
food supplyVitamin, mineral benefits not obviousOrganic does not mean pesticide-freeConsumers may be misled
Environmental IssuesEnvironmental Issues
Biodiversity is increased with organic farming
Legumes and/or cover crops Resists disease
Uses less energy on the farm Per unit area and per unit yield 7% more energy efficient Less waste from chemicals, feed Less fossil fuels consumed for fertilizer, also reduces
NOx emissions
Environmental IssuesEnvironmental Issues
Energy savings overall uncertain Demand in Europe, US Farms in Australia, Latin America and Asia Energy expended to ship product
Against ideology?
In the US, organic does not mean GM-free In Europe it does
Accumulating mineral deficits
Environmental IssuesEnvironmental Issues
Is organic food better for the environment?
Environmental advantages of organic food are more apparent than other advantages.
Problems with mineral deficits could become more important
Energy savings could become more important as energy prices increase
Should we go green?Should we go green?
Ultimately it’s up to the consumer and what they value.
Organic food won’t go away, judging by demand
But won’t take over either
Consumers need to be better informed Pesticides Nutritional Benefits
Questions?Questions?
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