I'm not reassured by the fact that it links to http://ramblings.jamestindall.info/post/102216847/1mb-1-lump-of-coal http://ramblings.jamestindall.info/post/1022

I'm not reassured by the fact that it links to http://ramblings.jamestindall.info/post/102216847/1mb-1-lump-of-coal http://ramblings.jamestindall.info/post/102216847/1mb-1-lump... as a source. That page manages to overestimate the energy cost of data transmission by 9 orders of magniture by confusing milliwatt-hours with megawatt-hours.