[floatrock]

Also, how can we avoid the potential for unintended consequences where this tech makes Google "greener" while GCP users become less green?

If a data center has (roughly, to a first-order approximation) fixed compute capacity at any point in time, and we assume that any capacity not being used by Google themselves is made available to GCP, then wouldn't Google reserving the "green" hours for themselves drive the remaining "dirty" hours onto the GCP spot markets?

Is there a cloud market design that addresses this tension between maximizing utilization and having desirable or 'premium' compute hours?