Next week the team at St Etienne City of Design returns from its vacation ready for a massive final push towards 15 November. That’s the date when when their biennial opens, and Doors of Perception has to fill its 5,000 square metre shed with a heaving throng of eco projects. Our event, City Eco Lab, is going to be amazing, and fab – but one is nonetheless envious of the artist Richard Serra who has filled his much bigger space in Paris with a few large objects.