There's no need to involve carbon here - there is a reason to adjust the time of power consumption due to cost, as at least in certain places the price of elect

There's no need to involve carbon here - there is a reason to adjust the time of power consumption due to cost, as at least in certain places the price of electricity during a single day can vary between near-zero to very expensive. And if certain mixes of generation are "too carbon intensive" then the same pricing is the proper mechanism to get electricity users to take it into account; apply a subsidy or tax depending on how polluting some generation is, and then let the market forces optimize which things can wait until a "cleaner hour" and for which it is worth to pay more to not wait.