México City, an enormous sprawling city, has struggled with waste for many years. With the closure of its largest landfill, and new initiatives to promote recycling and waste-to-energy solutions, México City is now in a position to be an example for the region. But behaviours and mindsets still have a long way to go. And there is lots that design can do here. Building on political momentum, we are calling on designers to use their creative problem-solving skills to imagine new narratives, services, products, spaces and systems to encourage cleaner and greener waste handling behaviours across México City.