Fifty years from now, one in three people worldwide will live in slums like Tondo in the sprawling megacity of Manila- built without proper sanitation, lacking medical facilities, and packed to capacity. Ricky Fuertes makes his living sorting through rubbish- tonnes of it, every day. He earns $2.50 a day scavenging so he can feed his family of five. But he faces his biggest challenge when his slum is burnt to the ground. Nearby, Chito Barquin dives for his money. He normally makes a living working salvage jobs, but times are tough so he now dives in polluted waters for old tyres he can sell to feed his wife and children.