QUESTION 2 – AIR QUALITY a. Describe the trends observed in the figure to the right. Explain why these trends exist. Using what you know about ozone, provide a feasible explanation for the difference between March and June. Do not exceed the space on this page. (8 pts) b. NYC outdoor carbon dioxide concentrations are roughly 400 ppm but measurements students made in 2013 found concentrations ranging from 600-1500 pm inside several NYU buildings. What causes this difference between indoor and outdoor air concentrations? Why is indoor air quality so important? Do not exceed 12 lines of text. (5 pt) c. How are the sources of NOx and SO different? If a city has an increasing population and NOx emissions but decreasing SO , describe possible causes for this trend. How could city planners decrease the NOx emissions? Do not exceed 15 lines of text. (7 pt) 2 2 QUESTION 4 – MARINE RESOURCES a. Using a graph for reference, please explain the concept of maximum sustainable yield in fisheries.You may draw it on paper and insert a photo of the diagram or use a drawing software if you prefer. Answer in 12 lines of text of less (excluding the graph spacing). (6 pt) b. Please explain how overfishing affects the average size of fishes, and why this is a problem for these fish populations. Please answer in 12 lines of text or less. (6 pt) c. Please explain the two main biological processes that are suggested to provide the main benefits from marine protected areas. Please answer in 15 lines of text or less. (8 pt)

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