Using Figure 1

question 31

Multiple Choice

Using Figure 1.4,which of the following statements are accurate?

• A) The overall trend shows a negative effect of time on hydrogen ion concentration in precipitation
• B) From 1965 to 1975 the trend is flat
• C) From 1965 to 1975 the trend is a decline in hydrogen ion concentration
• D) The data need to be looked at year by year and not over this long a period

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Definitions:

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