Those figures sound suspect to me, given the immense volume of searches performed on Google. I would guess that there's some double-counting going on. All else

Those figures sound suspect to me, given the immense volume of searches performed on Google. I would guess that there's some double-counting going on. All else aside, figures like those are all derived on the assumption that electricity is produced in a CO2 generating fashion. If we can figure out a better means of power generation, then all of these contributors get better at once.