It's just a visualisation of http://nextbigfuture.com/2011/03/deaths-per-twh-by-energy-so... figures from a couple of days ago, which I found highly dubious.

For example where are all the biomass deaths from? Why no figures for non-rooftop solar?

What does this "Hydroelectric power was found to to have a fatality rate of 0.10 per TWh (883 fatalities for every TW·yr) in the period 1969–1996" mean? How does spinning a turbine from dammed water cause death?

Ah ... further down the page "... Paul Gipe estimated ..." - so someones estimates without proper working or sources for death rates and such ...

I would love to see a well worked properly sourced analysis along these lines however.