Another often-cited roadblock to combatting global warming is the free rider problem. Reducing global warming requires a coordinated effort among all countries. But countries generally have little leverage to convince other countries to behave in a manner consistent with their own goals. And a country that free-rides on other countries’ efforts to reduce global warming receives the benefits from those efforts, but incurs none of the costs. Describe strategies that you would use to create incentives to get all countries sign an agreement. Why would your plan be effective?