London
London
London's popular bike share system is nicknamed Boris Bikes, for the city's charismatic mayor. Formally called Barclay's Cycle Hire, the program has been expanding, adding thousands this year alone.


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.

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