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 "Combustion Energy" Gives You This Achievement, But Also Locks Wind Power And Kinetic Energy 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!