In 2004 the Council of the Federal Polytechnics of Switzerland proposed that the country's per capita primary energy demand should be reduced by a factor of three from its current average of around 6kW to 2kWthe current global average-by 2150. During the past six years the semantics of this proposition have been much debated, but the concept has won overall favour, with several cities voicing their support. Indeed in November 2009 the inhabitants of the city of Zürich voted in favour of applying the 2kW city concept to their city, but targeting the year 2050. Thus, the city of Zürich is now committed to understanding which strategies should be employed and when, to achieve 2kW city status. But the city is not naïve, it fully appreciates that this target is ambitious and will only be realised through commitment and a multiplicity of transition strategies; some of which have already been implemented. But to understand, which are the most promising future strategies will require some form of predictive model. In this paper we describe one such model, which is currently under development, and the strategies that may be tested by it as well as outlining the already implemented strategies.
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