The clock is ticking. In the coming decades, with rapid urbanization and population growth, countries will be facing a major challenge: ensuring that the additional 3 billion city dwellers that the world is expecting by 2030 have access to adequate housing. This translates into a demand for 96,000 new affordable and accessible housing units every day. This challenge will be particularly massive in African and Asian countries where 90 per cent of the world’s population growth is expected to take place.