《绿色奥运:北京的承诺(英文)》内容简介：On March 28, 2007, the city of Beijinglaunched a campaign called "No car for a day,"and introduced bumper stickers associated with thisevent. Mr. Yang, who had just purchased a newcar, put the bumper sticker on his car and earnestlysaid, "I bought a car today, and I pledge to driveone less day each month."

In 2005, more than 500 auto clubs, environ-mental activists, college groups, media groups andcorporations came up with the idea of a campaignto "drive one less day each month," which was applauded by hundreds of thousands of car own- ers who have pledged to contribute to cleaner air in Beijing.