One of the criticisms of signing the Kyoto Treaty is the loss of national sovereignty it entails. This argument has little weight as modern nation-states are a labrynth of treaties that are legally binding domestically. As an example Australia has 1852 treaties currently in force. They are a common component of international law and co-operation. (more)

A quote: "In a mixed constitution where the bounds of the respective powers are not precisely and effectively fixed, their actual relations at any time will be determined by the accident of personalities and the advantage which the need of surmounting emergencies, or the prestige of emergencies already surmounted, may give to one institution or another" (more)
Cam Riley: South Sea Republic. Freedom, liberty, equity and an Australian Republic.