In my exposure, natural gas is best if you’re on a line, diesel if you’re not.
I agree - could almost say Natural Gas - City/suburbs [when available], diesel - country/rural.
And then there are the server farms that work completely off of UPS systems. They test their systems monthly simulating a complete sudden power loss. Those huge Caterpillar generator systems kick in and no one inside even sees a flicker in the lights. Data Protection without end.