What will our future climate sound like if we don’t act now? We adapted Vivaldi’s Four Seasons to 2050’s weather conditions. Musical design algorithms were fed with localized climate data to generate more than 1000 different variations of Vivaldi’s masterpiece. In collaboration with climate activists, NGOs and scientists, 15 youth orchestras from 6 continents performed their localised variations, amplifying the voices of a generation directly to those in power.