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In page Climate change in China:

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Bicycles are common in China.[citation needed] However, in the last 40 years cars use has displaced bicycles, leading to deterioration of air quality and to traffic congestion. The Chinese government responded by introducing bicycle sharing systems and bike lanes.[1][2] More than 360 Chinese cities have dockless bike-sharing systems that deploy nearly 20 million bicycles that travel an average of 47 million kilometres per day. According to the World Resources Institute report, dockless bike-sharing systems reduced China's GHG emissions by 4.8 million tonnes of CO2 annually.[3]