Problem: Imagine that you are trying to encourage people to reduce pollution. Using a cognitive dissonance approach, which of the following would you be most effective? Create a fear-based advert that illustrates the negative impact of pollution on humans and animals. Recruit an attractive person to deliver information brochures about pollution. Ask people to write convincing speech arguing that pollution is not that big a problem. Ask people to complete a checklist of all the behaviours they engage in to reduce pollution, wording the items so that they are difficult to answer yes to, and ask them to make a public commitment to reduce pollution.