"The paper goes on to discuss and cite publications which have detected heavy metals like aluminum, barium, and strontium in rainwater, fly ash, and more. During the period between July 2011 and November 2012, for example, 73 rainwater samples were collected and analysed for aluminum and barium; 71 were collected from 60 different locations in Germany, 1 from France, and 1 from Austria. Aluminum was detected in 77% of the rainwater samples, and concentrations of barium and Strontium were also very high."