kabir riton is a journalist who's researched cattle smuggling. he says it continues to flourish despite efforts by indian authorities to curb it. the cattle from india are crammed on to trucks and transported to the bangladeshi capital dhaka, four hundred kilometers away. >> the value of a cow doubles by the time it reaches dhaka, to about three hundred euros. the exact price depends on how long the trip takes, and how much in bribes the driver has to pay to local authorities along the way and to the transport mafia. but a cow from india is still cheaper than a home-grown one. >> one of the many tanneries in dhaka. this is the end of the line for the holy cows. kamal hosein has been working here for almost two decades. he doesn't even wear gloves to handle the hides, which are treated with chromium in large wooden drums. the floor is covered in a thick brew of toxic chemicals. untreated, they flow into the drain. that's illegal. but anti-pollution laws are not enforced. for fifteen years, the government has been talking about closing down tanneri