This resource examined the mortality rate from energy production. There is a limitation in the data source as there is no standardized method for selecting death rate sources, for instance, Sovacool et al. (2016) considered only deaths from accidents in biomass energy production. Also, nuclear data from Markandya & Wilkinson (2007) included both major nuclear accidents (with the exception of Fukushima, since it occurred after publication) plus occupational deaths from mining, transport, and other routes of exposure. The authors noted that nuclear deaths occur "largely at the mining, milling, and generation stages". However, Sovacool et al. (2016) only include deaths (all of which were indirect) from the Fukushima disaster since the underlying data spans the period from 1990 to 2013. Educators should note this. However, the resource is valid for teaching.