Better but still way too absolutist. It is very probably intractably=20 expensive to use coal for anything without CO2 output. Try much harder.
Hardly the point, it also is a, not too unreasonable, map of energy use = density.
world_map.PNG
There too many to list. Just the same, some ideas to use the data = sources indicated=20 to think about: Population statistics (of various kinds) versus energy usage by locale; Population statistics versus economic statistics by locale; Economic statistics versus energy usage by locale;
See also Gini coefficients versus locale.
Lots of things to learn, by studying these like i (still) do. But maybe = you think your=20 plate is too full already.
YMMV