Government does not have to force miners in sourcing for alternatives, because they were being taxed and pay for every electricity utility on their supply.

Secondly, miners themselves knows the best and most suitable sources for their energy supply in bitcoin mining, some have already been using renewable sources as alternative to the one being supplied by government, all they ha e to consider is the affordability and utilization, this will not reduce mining capacity because the hashrate is more considerably on this, while the energy supply will only have to be more of being sustainable and affordable as I've said, but have no impact on the mining if miners uses renewable sources or go green.