Energy
America’s Three Power Grids
America has three electrical grids that are not synchronized to each other, and can not move alternating current electricity between one and another.
Generally speaking, a power plant in Oklahoma can't send electricity to most of Texas or Colorado.
Each grid was built separately and are incompatible with each other, although a limited amount of electricity can be moved between the interconnections using AC to DC to AC conversion. But such conversion is complicated and expensive, and isn't as simple as stringing lines between the grids.
NPR
Solar Panels Explained – Unravel the Mysteries of How Solar Panels Work!
NPR
Global coal use at all-time high in 2023 – IEA | Reuters
Buildings Heated with Geothermal in New York
While this data is a year and half out of date, and some local assessors don't correctly use the new FUEL_TYPE code, it is still interesting.