Bicycle advocacy groups from four major U.S. cities joined forces to produce the first annual Urban Transportation Report Card, which was released yesterday. "Because of their density, cities are inherently green places to live but there is much more that can be done to reduce pollution and greenhouse gas emissions," said Paul Steely White, executive director of NYC-based Transportation Alternatives, in a statement. "We are all in competition to help Americans live the greenest life possible."The good news is that New Yorkers use public transportation far more than any of the other cities surveyed with 53 percent of New Yorkers relying on mass transit for their daily commute compared to 31 percent for San Francisco, which came in second. Ten percent of New Yorkers walk to work, the report said. However, New York falls short on bicycle infrastructure such as racks, lanes and storage facilities. There are only five bike racks in the city for every 10,000 New Yorkers.The report advocated making life easier for bicyclists. The other cities surveyed were Chicago and Seattle."In New York City, one fourth of all driving trips are one mile or less," said bike advocate Noah Budnick, "Over 50 percent of driving trips are less than three miles. Those are distances that could be biked in the same time it takes to drive."