On Earth Day, April 22, 2010, PlaNYC turned three. Mayor Michael Bloomberg celebrated the birthday of his wide-sweeping plan to reduce carbon emissions by 2030 with festivities in Times Square. Pepsi was there to show off its new recycling machines. Office Depot made an appearance to display its double-flush toilets and hand out gift bags. We stopped in at two of the more PlaNYC-related booths: the Parks’ Department table to talk about the MillionTrees NYC initiative, and the booth for Transportation Alternatives, an advocacy group that promotes low-impact modes of getting around town.

We brought back the following reports for you, which touch on some of the more successful elements of PlaNYC, and some that might need improvement.

Video: MillionTrees and PlaNYC

Andrew Newman knows a lot about trees, particularly the more than 300,000 the city has planted since 2007 as part of its PlaNYC goal to add one million trees to the city’s streets by 2030. Click here to learn a little more about the project, and how more trees contributes to the effort to make New York for a cleaner, greener city.

Video: Do Parking Requirements Counteract the Goals of PlaNYC?

On the third anniversary of the plan, Transportation Alternatives took a critical look at PlaNYC’s efforts at “transit oriented development,” focused particularly on the zoning regulations that require new buildings include a certain number of parking spaces per residence. Take a look at why Aja Hazelhoff thinks providing parking works against the ultimate goal to make New York more sustainable.