True, centralized power generation using a grid that can carry that load would be the best solution. But in absence of that, the alternatives only seem to be be

True, centralized power generation using a grid that can carry that load would be the best solution. But in absence of that, the alternatives only seem to be between inefficient decentralized green and inefficient decentralized non-green solutions. In that case, I'd opt for the green ones. (Or of course: no datacenter at all)