Changing what people know or think does not necessarily change what they do on a day to day basis. This is easy to say, but changing people's day to day habits is the hardest task imaginable. It is the failure point of all of the billions of dollars spent on sustainable development plans in the past thirty five years of global environmental concern. This is a major problem for all improvement programs, the very act of assisting can promote further dependency. A planner or government agent cannot change anybody's habits.
People have to change their own habits.
When they do change their habits, people do it instantly. It does not take time to change a habit pattern, but it may take decades or even a lifetime to get around to doing it. It is hard for even one person to change their habits - even when they know it in their own best interests. The participatory approach, as seen in the example of farm research in Fiji , helps farmers and government workers actively work together to examine and solve agricultural problems. A vision with measurable milestones and regular reviews succeeds.