and one of the complications around dispersants is the fact that dispersants are seen as proprietary technology, that the companies who make them don't disclose what's in them. >> we cannot allow for these companies to be using dispersants, chemicals in ways that could ultimately have profound impacts on not only the food that is provided from that region, from the fishing, but also the impact that it could ultimately have upon human beings. >> are you also hearing concerns voiced about the long-term impacts of dispersants? that's one thing that i know a lot of fishermen when i was down there were talking to me about and the government saying yeah, they're doing long-term studies but they don't know. >> right. very much so. they don't know the long-term impacts and that's what is what really scares people here. >> that is what really scares people. now, three years down the road, some of the very ominous unanswered questions asked on the gulf coast when that spill was happening and dumping all of