In this technical report we describe a scenario designed by the "Office fédérale de l’environnement" (Mr Romero), this scenario is detailed in table 1. In this scenario we assume that a carbon tax 1 USD2001 per ton of CO2 (i.e. 3.66 USD per ton of carbon) is enforced at the world level over the whole time horizon of the simulation (i.e. 2007-2040). 50% of the tax revenue in each country is allocated to households in the own country. The other 50% of the revenue is allocated to a fund and redistributed to developing countries on the basis of the estimation of the adaptation costs supported by these countries.