Much of Johannesburg’s water comes from Lesotho's highlands, where a major dam project could shape the future of supply as aging infrastructure and climate pressures strain the system. The project is also a major source of revenue for Lesotho, generating hundreds of millions of dollars each year. Bloomberg's Jennifer Zabasajja reports. -------- More on Bloomberg Television and Markets Like this video? Subscribe and turn on notifications so you don't miss any videos from Bloomberg Markets &