For me, the saddest stories are about needless human suffering, suffering caused by greed, hate, or more maddeningly, the inability of responsible people to act responsively. Minamata and Fukushima are both that kind of story.
Here is my plan in Japan: Organize mothers throughout the country to go with government officials to measure food stuffs together. Seeing is believing. If mothers give the green light, then this can be an important part of the trust rebuilding process.