"Urban transport systems based on a combination of rail lines, bus lines, bicycle pathways, and pedestrian walkways offer the best of all possible worlds in providing mobility, low-cost transportation, and a healthy urban environment." –Lester R. Brown, Plan B 4.0: Mobilizing to Save Civilization.
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Plan B Updates are released as new developments and initiatives occur. They focus on trends affecting progress toward a sustainable future. Updates are also offered in Bengali, Chinese, Danish, Farsi, French1, French2, Italian, Japanese, Polish, Portugese, Spanish, Spanish 2, and Swedish.