©2009 water sustainability sean cady levi strauss & co. 31 march 2010 afirm hong kong seminar
TRANSCRIPT
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©2009
Water Sustainability
Sean Cady
Levi Strauss & Co.
31 March 2010
AFIRM Hong Kong Seminar
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Current Situation
• Over 2 billion people lack access to improved sanitation
• More than 850 million people do not have ready access to potable water
• Physical water scarcity continues to grow• Economic water scarcity will expand with
growing population
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Life Cycle Analysis“…the compilation and evaluation of the inputs, outputs and the potential
environmental impacts of a product system throughout its lifecycle”
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Product lifecycle impactLevi’s® 501®
NEW CAPABILITIES
is equivalent to:
Data from LS&CO.’s Life Cycle Assessment on Levi’s® 501® jean for U.S. Market, 2006 production year
• 120 km driven by the average auto in the United States
• The carbon sequestered by six trees per year (based on EPA representative sequestration rates of tons of carbon per acre per year)
32.3 kg of CO2
3480.5 liters of water
• Running a garden hose for 106 minutes
• 53 showers (based on 7 minute showers)
• 575 flushes of a 3.78 liter/flush low flow toilet
400.1 MJ of Energy
• Watching TV on a plasma screen for 318 hours
• Powering a computer for 556 hours, which is equivalent to 70 work days (based on 8 hours of computer use per day)
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Water use impactLevi’s® 501®
NEW CAPABILITIES
1575.2
0.4
1704.0
72.1 110.818.1
0
200
400
600
800
1000
1200
1400
1600
1800
Use
End of L
ife
Cotton
Fabric
Cut/Sew
/Fin
ish
Logistic
s/Ret
ail
45%
49%
2%
3%
1%
Use Cotton Fabric Cut/Sew/Finish Logistics/Retail
Cradle-to-Grave Water Consumption,% by Phase
Cradle-to-Grave Water Consumption,Amount by Phase
For the studied Levi’s® 501® jeans (cradle to grave), water consumption was highest at the cotton-production and
consumer-use phases (49% and 45% respectively)
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World Projections
• By 2050, the world population will be over 9 billion people• Increased competition for agriculture land and water• Increased water scarcity• Increased price of water
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Water Discharge• Clean wastewater before discharge• Discharge to dirty river?• Better use for clean water?
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Levi Strauss & Co.Opportunities for Minimizing Water Use
• Cotton agriculture• Manufacturing
− Dying, fabric mill, laundry
• Own operations− Offices, retail stores, distribution centers
• Consumer washing practices
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What You Can Do
• Minimize water use• Use appropriate chemicals (no excess)• Lower liquor ratios for dying• Functioning wastewater treatment system• Recycle water back to process• Reuse water somewhere else onsite• Countercurrent piping system
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©2009
Thank You