Premise: Hundreds of sea gulls scavenge for food as bulldozers bury rubbish at the now-closed Wake County Landfill in North Raleigh in this file photo. A study by Duke University researchers concludes that gulls feeding on trash can be a significant course of nitrogen and phosphorus at nearby lakes. TRAVIS LONG TRAVIS LONG
Hypothesis: Sea gulls when feast on the rubbish can cause a significant change in the level of nitrogen as well as phosphorous in the nearby water bodies.