Environmental Effects
The environmental effects of motorized bicycles varies according to the power source. Most electric bicycles are considered by some to be zero-emissions vehicles, as they emit no combustion byproducts. However, the environmental effects of electricity generation and power distribution from plants generating power from fossil fuels, as well as manufacturing and disposing of (limited life) high storage density batteries containing toxic materials must also be taken into account. Older two stroke engines, commonly use in motorized bicycles powered by internal combustion engines often emitted more pollution than automobiles due to partial combustion of oil included in the fuel, but this is not the case with four-stroke or newer 2 stroke motor designs.
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