The document that the boys of the Extinction rebellion association brought to Corriere the other day tells of a great contradiction: in the Cop, Conference of the Parties, in Rio (it was 1992) the States of the earth had committed to stop the “emissions of industrialized countries to 1990 levels by 2000 ”. It takes little to verify that those goals are still a long way off. Yet the meetings in Milan, precisely in the part of the involvement of young people, not only of Greta, represent the most interesting passage of the things that are changing. Slowly, sure. But Prime Minister Mario Draghi said that this time they will be heard, really, in view of the Glasgow summit. It is no coincidence that the most used word for the defense of the planet is “transition”. Yet that push of the new generations must be considered necessary. Businesses, which have long been resistant to change, have begun to consider sustainability as a new competitive possibility, saving water, raw materials, adopting social criteria, proximity to the territory, are now indispensable elements for raising capital and increasing profits. Not just a moral issue, but a market issue. On Thursday, the boys occupied the stock exchange with their banners, but in those rooms the issue of sustainability was dealt with many times, intermediaries and institutional investors were involved. Here, the crux remains the speed of the transition. And support for those who risk paying the highest bill. The choice of Milan to host the pre-COP, now that the lights of the meetings give way to negotiations between the States, represents a clear signal: the city can become the Italian capital of sustainability. That photo of the Minister of Transition, Roberto Cingolani crouched next to Greta says a lot about the new listening needed between the parties. The industrial tradition of the city, despite all the contradictions and errors of the twentieth century, can make it the engine of the circular economy. This is already happening and which, as Symbola’s analyzes show, allows companies to better resist shocks, to distribute more value to the territories. Universities are orienting training in that direction, companies, albeit with an inevitable dose of green washing, are redefining their operating schemes, the new generations are pushing. The Next generation EU allocates around 80 billion to invest on the ecological transition front. The conditions are all there, and Milan can grasp them.