The US – wide study tested the hypothesis that contamination by cyanobacterial blooms is a risk factor for non – alcoholic liver disease. Using the data on spatial distribution of cyanobacterial bloom provided by European Space Agency Environmental Satellite, they estimate the spatial distribution of cyanobacterial blooms in the US. 62% of the studied cases showed signs of cyanobacterial bloom. After producing the coverage maps, the researchers calculated mortality rates from non-alcoholic liver disease at the county level, for 1999 – 2010. Overall 773 828 non-alcoholic liver disease deaths were reported in the US from 1999 – 2010. Further analysis showed that bloom coverage was significantly related to risk of death from non – alcoholic liver disease. The researchers calculated that for every 1% increase in cyanobacterial bloom coverage, the risk from non – alcoholic liver disease death increased by 0.3%. If bloom coverage per county in the US increased by 1%, it would result in 440 additional deaths per year.
More data can be found on the following link of the Science for Environment Policy.