 | Bike | Car |
|---|---|---|
| Number of wheels | 2 (sometimes with training wheels) | 4 |
| Number of seats | from 1 to 3 | 5-15 |
| Pollution | Almost none. Only needs a bit of oil and rubber (tires, etc.) | greenhouse gases and batteries from electric cars get thrown into landfills. |
| Use | For manual transportation for exercise | Transportation |
| Fuel source | humans | Gasoline, Diesel, Natural gas, Electric, Hydrogen, Solar, Vegetable Oil |
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