介绍了机动车对上海空气的严重污染及上海无轨电车萎缩的状况，提出了发展无轨电车是建立绿色交通体系的有效途径之一及在上海发展无轨电车的有利条件和需解决的问题。
The serious air pollution , decline of trolleybus operation , intended development of trolleybuses in a bid to set up " green traffic " and problems awaiting solution for developing trolleybuses in Shanghai are reported .
上海无轨电车