Biking among different cities in China, South Korea, Europe, and countries in America counties
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The main reason why biking reduces air pollution is that it doesn\'t use any fuel. The average car produces about 1.3 billion cubic yards of polluted air over the course of its lifespan. Worn tire particles, brake garbage and the emissions from the plastic and other materials in the car also contribute to air pollution. Actually, I had cycling alone from Chengdu of Sichuan province to Lhasa of Tibet as my university graduation trip in 2010.
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Thanks for the idea Ka Chun -- maybe we could make the bikes out of recycled materials as well