The ethical arguments for polluters to pay for emissions are well established.
The most recent negotiations in Bali during the UNFCCC COP 13 have also shown the acceptance that developed countries should compensate the developing countries for the harm done. The current increased level of CO2 in the atmosphere is due to the growth and decades of prosperity of developed countries.
The starting point for IMERS was the recognition that mitigation and adaptation are both important, and that the UNFCCC principle of 'common but differentiated responsibilities' can be delivered in a novel way for international shipping.
IMERS has therefore been designed to fulfil on the following five principles:
Note: There is a growing literature on the ethical aspects of climate change, including on the responsibility of governments to tackle the threats and impacts of climate change. One of the web-sites dedicated to the topic is: climateethics.org.