Perfect for Business Ethics, this Marketplace documentary goes undercover to expose the techniques used in door-to-door sales of water purification systems — devices that can cost thousands of dollars, but which most people simply may not need. Co-host Tom Harrington investigates the dubious scare tactics used to entice people to buy.
Visit the Marketplace website for additional resources, including the science behind the water test, how to combat aggressive sales tactics and where to contact consumer affairs
