After You Research All The Way Up To Electricity, You Get A Quest To Help Nuggola Tesla Fix A Battery.
- Doing This Quest Will Give You The Below Achievement And The Option To Pick 1 Of 3 Power Supplies.
Picking "Kinetic Energy" Gives You This Achievement, But Also Locks Combustion And Wind Power For The Remainder Of The Playthrough.
In My Opinion, Wind Is The Best Choice.
- Relatively Cheap.
- Kinetic Falls Off After Population Grows.
- Combustion Requires A Non-Renewable Resource, So You Could Feasibly Run Out.
If Lazy: You Can Save Before Picking And Just Reload The Save Twice For The Other Two.
Good Luck!