I was reading an interesting article in The Conversation on the 8th March 2013: "Plastic and politics: how bureaucracy is failing our forgotten wildlife" by Jennifer Lavers [Monash University]. This article would make an excellent trigger for an Introduction in a WebQuest investigating the environment, ecology, North Pacific Gyre or Great Pacific Garbage Patch; plastics and their effect on marine life particularly birdlife. The statistics involved with the amount of plastic is staggering!
The target audience could be students in Years 9 - 12 or University students. The Perspectives could be: a Marine Biologist, a Fisher, a Bureaucrat, a Statistican, and/or a Representative of the UN.
The Conclusion could ask students to investigate the collection of plastics within their environment of school or university; the types of plastics present in their normal everyday activities; and, their chemistry and pollution aspects.