-This Figure Shows the Chloride Concentration in Baltimore -Area Streams

question 6

Multiple Choice

-This figure shows the chloride concentration in Baltimore -area streams. Which of the following conclusions can be drawn from the data shown?

• A) Urban areas are more impervious than rural areas.
• B) Chloride levels in suburban streams are safe for land plants.
• C) Streams in rural areas are contaminated with nitrates and phosphates from the overuse of fertilizers.
• D) Urban streams are contaminated mainly with chloride flowing in from suburban areas.
• E) Land plants contribute considerable amounts of chloride to urban streams.

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