Hybrid: at least 2 energy sources (2)
Electric: electric source of energy (E)
Human: one person (h)
A few examples:
- Walking: human (h)
- Bicycle: human (h)
- Electric assisted bicycle: human + electric (2)
- Scooter/Motorbike petrol: electric 6V + petrol (2)
- Petrol car: electric 12V + petrol (2)
- Diesel car: electric 12V + diesel (2)
- Hybrid car: electric + petrol or diesel (2)
- Gas car : gas + petrol (2)
- E85 car : oil + petrol (2)
- Hydrogen car: electric + hydrogen (2)
- Scooter/Electric Motorcycle: Electric (E)
- Electric car: electric (E)
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