Whereas it started as a movement driven by environmental concerns, over these last years there has been increased emphasis on social equity and fairness issues, and in particular the need to ensure proper access and services for lower income groups and people with mobility limitations, including the fast-growing population of older citizens.
虽然开始它是为解决环境问题才被关注的，但过去几年来，社会公平和公正问题越来越被重视，尤其需要确保低收入群体和流动受局限的人，包括迅速增长的老年人口在交通和服务上的便利。