"...[T]he Copenhagen Accord is "only" a political agreement, so it does not provide sufficient assurance that countries will take action. But how much difference does it make that the Copenhagen Accord is a political rather than a legal agreement? Obviously, political agreements do not require domestic ratification, so they provide a weaker signal of domestic commitment. But the legal versus non-legal form of an instrument makes less of a difference in other respects, such as judicial enforcement, since even when an agreement is legally-binding, there are relatively few opportunities for adjudication either internationally or domestically. And evidence from other regimes suggests that states often take non-binding agreements quite seriously and make significant efforts to implement them."