Last Friday, New York City celebrated it's first car-free Earth Day, pedestrianizing some Manhattan streets and encouraging New Yorkers who typically commute by car to opt for subways, buses, biking, walking, or other alternate transportation modes. City officials vowed that next year's car-free Earth Day would build on the original. Tell us which option would do the most to accomplish that, and if you sign up to receive email updates (you can unsubscribe any time), you'll earn a chance to win a StreetsPAC t-shirt!