Bike commuters from all boroughs and occupations available for interview.

New Yorkers already have some of the greenest commutes in the country. But in a city as dense as ours, there are millions of daily driving trips that could be undertaken by greener modes. The average car commuter emits 4,000 lbs of CO2 each year, while biking is carbon-neutral. Roughly 75% of driving trips in New York City are less than five miles in length, a distance bikeable in 30 minutes for most adults. And with 200 new miles of bike lanes added since 2006, biking in NYC is safer and more convenient than ever.

What's good for Mother Nature is also good for the bottom line; bike commuters save an estimated $5,300 annually over their driving neighbors, even without factoring in the cost of gas and parking.

"The key to living green isn't rocket science. In fact, it doesn't involve engines at all," says Paul Steely White, Executive Director of Transportation Alternatives. "In these tough economic times, walking and biking to work, even one day a week, not only saves emissions; it saves money."

T.A.'s transportation Carbon Calculator is available at rollingcarbon.org and tips for new bike commuters are available at bikemonthnyc.org/tips.

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