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    Exam 29: Energy Flow and Nutrient Cycling in Ecosystems
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    According to the Data Presented in the Graph, Between 1960
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According to the Data Presented in the Graph, Between 1960

Question 103

Question 103

Multiple Choice

According to the data presented in the graph, between 1960 and 2000, CO2 levels rose approximately ppm. According to the data presented in the graph, between 1960 and 2000, CO<sub>2</sub> levels rose approximately ppm.   A)  50 B)  70 C)  370 D)  20 E)  320


A) 50
B) 70
C) 370
D) 20
E) 320

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