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Hangzhou, China
Hangzhou, China
Hangzhou is in contention for the largest bike-sharing system in the world, with a reported 60,000 bikes. China, long known as the Bicycle Kingdom, has struggled somewhat in recent years to make biking cool for an increasingly wealthy urban population.


By Anne VanderMey, reporter @FortuneMagazine - Last updated July 19 2012: 8:49 AM ET
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Google's zero-carbon quest

The search giant has an ambitious plan to achieve its goal: becoming the world's most energy-efficient company.