Bangladesh has become one of the biggest exporters of shrimp in the world. For thirty years, many people in the country's south have made a lot of money farming shrimp. But while the industry has benefited some, it has come at a cost to others. Many farmers have been displaced because they can no longer support themselves off the land, which has become contaminated because of the the shrimp farms. Al Jazeera's Maher Sattar reports from Khulna, Bangladesh.