By the numbers
70,000: The number of bicycles Wuhan, China, says are in its bike-share system, the largest in the world. In some Chinese cities, as much as half the population commutes by bike (in the Netherlands, it's 30%). The country also makes about two-thirds of the world's cycles.
$1,600: The average cost per year to maintain a shared bike. In New York City's setup, which makes its debut this summer (at 10,000 bikes, the largest program in North America), borrowing a bike will cost $95 a year; in London it is $70 a year; in Paris it's about $36.
$41 million: Amount paid by Citigroup to sponsor New York City's soon-to-launch 600-station service (called Citi Bike), which is being installed at no cost to taxpayers. In Europe many programs are run by advertising agencies such as Clear Channel Outdoor and JCDecaux.
The search giant has an ambitious plan to achieve its goal: becoming the world's most energy-efficient company.
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