Explore controversies related to your problem.

You should address your problem from different angles (i.e. prevention, punishment, regulations, etc.). Refute/rebut counterclaims to your solution that others might have. Discuss previous solutions to this problem and whether they have worked. Your conclusion should explain why this problem must be dealt with, why your solution is the best one, and end with a last key piece of research (a quote, interesting statistic, etc.).