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Rural Suburban Urban 600 1998 • 2001 1999 • 2002 500 2000 400- Chronic toxicity to 300- freshwater life 200- Damage to land plants 100 - 10 20 30 40 50 Percent impervious surface in watershed Mean annual chloride concentration (mg/L)

Rural Suburban Urban 600 1998 • 2001 1999 • 2002 500 2000 400- Chronic toxicity to 300- freshwater life 200- Damage to land plants 100 - 10 20 30 40 50 Percent impervious surface in watershed Mean annual chloride concentration (mg/L)

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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In how many years did mean salt concentrations in urban
areas surpass the level of chronic toxicity to freshwater life?

Rural Suburban Urban 600 1998 • 2001 1999 • 2002 500 2000 400- Chronic toxicity to 300- freshwater life 200- Damage to land plants 100 - 10 20 30 40 50 Percent impervious surface in watershed Mean annual chloride concentration (mg/L)
Transcribed Image Text:Rural Suburban Urban 600 1998 • 2001 1999 • 2002 500 2000 400- Chronic toxicity to 300- freshwater life 200- Damage to land plants 100 - 10 20 30 40 50 Percent impervious surface in watershed Mean annual chloride concentration (mg/L)
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