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Waste Disposal: Coming CrisisMar. 12, 1969
Solid Waste TechnologyAug. 23, 1974
Pollution Control: Costs and BenefitsFeb. 27, 1976
Preventing Groundwater ContaminationJul. 12, 1985
Garbage CrisisSep. 11, 1987
Living with Hazardous WastesJul. 29, 1988
America Turns to RecyclingNov. 17, 1989
Garbage CrisisMar. 20, 1992
The Economics of RecyclingMar. 27, 1998
The New EnvironmentalismDec. 1, 2006
Future of RecyclingDec. 14, 2007
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