The document discusses challenges around adequate, secure, and affordable housing in cities in the global south. It outlines three main challenges: rapid urban growth is outstripping housing supply; cities have smaller budgets than global north cities; and slum populations continue to rise. It then discusses three strategies to address these challenges: in situ upgrading of informal settlements; developing more rental housing options; and converting underutilized urban land to affordable housing. Successful examples from places like Thailand, South Africa, Bolivia, and Chile are provided.