Energy

Energy is a feature of a product and transportation

Material energy

• Diesel (Trucks, cars, trains...)
• Fuel (multiple octanes, unleaded vs. leaded) (cars, motorcycles...)
• Biofuel (cars)
• Crude (ships)
• Kerosine (airplanes)
• Hydrogen (cars)
• Wood (heating, cooking...)

---

Electricity

• Oil
• Nuclear (causes nearly permanent damage in the form of making radioactive materials from less radioactive ones)
• Coal
• Natural gas
• Solar
• Water
• Wind
• Wood
• Peat
• Burning rock

---

Natural

• Sun (farming, heating...)
• Wind (sailing)
• Animal (carrying)
• Human (human labor)
• Waterflow (transport)

---

this is in no special order and incomplete.