Urban population is exploding and by 2030, nearly 60 percent of the world's projected 8.3 billion people will live in cities. This translates into a need for 300 million new homes. Currently, 828 million slum dwellers are highly exposed to climate change and natural disasters, due partly to substandard housing but also to segregation and inequality. Worldwide, 93 percent of people have no access to formal housing finance products. Delivering affordable housing at global scale requires tackling three parts of the value chain: housing supply, housing finance, and institutional frameworks.