If a good is considered exchangeable and rivalrous then the good is considered a private good and can be regulated. If the good is exchangebale but non-rivalrous then the good is considered a toll good and can be subsidized. If the good is non-exchangeable and rivalrous then the good is a common pool resource and can be regulated and taxed. While if the good is non-exchangebale and non-rivalrous it is a public good and it provides for society. The how of public policy deals with the tools used in exercising public policy, for instance, laws, regulations, mandates, services, goods, protections, taxes, costs, money, incentives and funding. All these tools are at the disposal of the government and can be utilized to their