The Environmental Impacts of E-bikes in Chinese Cities

Electric bikes have captured a large share of trips in many Chinese cities. They provide high levels of mobility and use little energy, two things that Chinese cities need to optimize. However, these benefits come at a cost, particularly emissions from primarily coal power plants and increased lead waste from battery use. Chinese policy makers are struggling with developing appropriate policy that maximizes modal options and mobility and minimizes environmental impacts. Electric bikes use very little electricity and, as a result, emit low levels of pollution per vehicle (passenger) kilometer traveled, even compared to fully occupied buses. The most problematic issue with electric bikes is the use of lead acid batteries that have high lead loss rates during the production, manufacturing and recycling processes. Most other motorized modes also use lead acid batteries, but their rate of use is lower and thus they have lower lead emission rates per kilometer. This research investigates and quantifies the environmental implications of electric bike use in China; particularly energy use, air pollution, solid waste and water use. A framework for policy analysis is presented and potential regulatory mechanisms are discussed. This investigation can inform policy by quantifying environmental impacts so that problematic parts of the life cycle can be addressed, rather than banning electric bikes all together.