ACKNOWLEDGEMENTS
Funds for the work described in this paper came from the Atkinson Center for a Sustainable Future, USDA
Federal Formula Funds, and National Science Foundation Informal Science Education program (ESI 0125582).
We also acknowledge the support and suggestions offered by Alex Kudryavtsev, our colleagues associated with
Mayor Bloomberg’s MillionTreesNYC initiative, and three anonymous reviewers of an earlier version of this
paper.