he usesed to pay about 35 5 eua month. now he pays 40. he thinks it's worth it. mzwandlie: actually i am very, very, very happy, because if you are staying in the shack it is not like you are staying in the room. shack is like, it is not a place to be as a human being, actually. to stay in a room is where you feel confident and everything, and shack is not a room. reporter: buililding rubble isa major environmental problem in the impoverished districts of johannesburg. many companies just dump their waste inin the townships to o d papaying disposal fees. nondumiso o sibiya knowsws thil too well. every day, dozens of trucks come to her neighborhood to illegally dump building waste from more prosperous areas. this bothered her a lot, until it inspired her to become an entrepreneur. now she's founded a start-up that processes waste. nondumiso: a lot of people do waste removal, right? they collect wasaste and then ty collect waste. but then we actually take responsibility of where the waste ends up. we rehabilitate roads with the waste. we compost it. we also o redis