Chemicals leaked over France have unknown health effects. Officials deny hazards, yet citizenry are skeptical. According to the NYT  “…it would be wrong to say that their doubts are completely unfounded. In 1986, the authorities implied that a radioactive cloud drifting west from the stricken nuclear plant at Chernobyl had halted, as if by some miracle of geography and science, just before France’s eastern border.” http://www.nytimes.com/2013/01/23/world/europe/smell-of-gas-causes-alarm-in-northern-france.html?emc=eta1&_r=0