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The 2030 tail gas is no more the synonymous of the pollution.
The top priority of the human development is to protect the environment. Currently, the most environmental travel tool is the bicycles. However, rare assistances to the environmental protection can be achieved except for pollution-free. To solve the above problems, we design the O2-bike which can operate the air cleaning unit at the rear and forward itself through the powers brought by the pedals during the riding. The operating method of the O2-bike is to purify the absorbed air and discharge the fresh and healthy air.