JOHANNESBURG/CAPE TOWN — There’s a giant clock ticking until the next major city runs out of water, and it could take a trillion dollars a year to stop a countdown that affects us all. That’s what the World Resources Institute estimates the world would need to spend every year – 1% of global GDP — to deliver sustainable, clean water for the world. In our most ambitious mini-documentary yet, Water Crisis: Lessons from South Africa, I met up with journalists Sam Mkokeli, and Latashia Naidoo to report from where the reality on the ground suggests the clock is going to be repeatedly hitting...…JOHANNESBURG/CAPE TOWN — There’s a giant clock ticking until the next major city runs out of water, and it could take a trillion dollars a year to stop a countdown that affects us all. That’s what the World Resources Institute estimates the world would need to spend every year – 1% of global GDP — to deliver sustainable, clean water for the world. In our most ambitious mini-documentary yet, Water Crisis: Lessons from South Africa, I met up with journalists Sam Mkokeli, and Latashia Naidoo to report from where the reality on the ground suggests the clock is going to be repeatedly hitting...WW…