Electricity ≠ Energy
Some countries use a shiton of energy that is not electricity, sometimes because they don't have electricity, they just burn wood or coil for everything anf this has a much lower efficiency and much higher pollution per kWh consumed.

Usually electicity is the most efficient way to move thing/people and sometimes heat thing/space, then if the electricity is produced with a low polluting method, it's also the less polluting energy consumed.

Of course, not comsuming the energy in the first place is always less polluting but humains need energy to live and more to live more comfortably. 
We could write books about optimizing our energy consuption and change our society to waste much less, work less (which consume a lot for often nothing really produced) while being more free. Bitcoin can be a first step but it will not solve everything.