Climate change is the defining challenge of our time. It exacerbates natural disasters, conflict and mass migration on a global scale. With cities consuming over two-thirds of the world’s energy and buildings generating almost half of global greenhouse gas emissions, how we design our urban environments is key. Architects and designers are in a unique position to push for more energy-efficient technologies and processes, from creating material passports in construction and reducing urban heat island effect in major cities to restoring ecology in drought-ridden areas and addressing the urgent needs of climate refugees. The climate change problem will not be solely solved by design, but it cannot be solved without it.