"Among the instruments of implementation at the international level, I attach the highest priority to the introduction of international taxation and the establishment of an international central bank." - Mahbub ul Haq, Director of Policy Planning World Bank (1970-1982) and RIO Member (p321)
"The gradual introduction of a system of international taxation which should be handled by a World Treasury, both to meet the current as well as the development needs of the poorer nations;" - 184
But the concept need not be accepted in its entirety: it can be introduced gradually over time through a variety of devices:... (b) certain sources of international financing can be developed - such as tax on non-renewable resources, tax on international pollutants...
Bridges, a newsletter published by the International Centre for Trade and Sustainable Development reported in 2006 that then-French Prime Minister Dominique de Villepin suggested that countries that don't join a post-2012 international treaty on climate change should face extra tariffs on their industrial exports.