in ecological economics and or environmental economics grandfathering is typically seen as the most unfair distribution and the reason why we do it also in a mission training system the first five 00:40:19 years I started with grandfathering because it's feasible as you start from where you are so it's realistic in a way and then you approach Industries or countries where they are so all the road maps start from 00:40:31 grandfathering because you start from where you are it doesn't mean that it's fair that some counters have very very high emissions per capita is it fair the United States had three times higher than Sweden per capita 00:40:43 and therefore they should have three times more allocation than Sweden well we can argue that so generally it's not fair but it's it might be feasible and the common budget differentiate 00:40:56 responsibility increases perspective capabilities principle there is no unique scientific answer to this it's an ethical issue that is worth a sincere public discussion and political 00:41:08 negotiation so we cannot really answer this in scientific way