Acknowledgements
This work was funded by the Johns Hopkins Center for a Livable
Future (CLF) with a gift from the GRACE Communications
Foundation, which had no role in study design, data collection
and analysis, decision to publish, or preparation of the manuscript.
The authors would like to thank Dana Gunders, Natural Resources
Defense Council for reviewing an early draft of the manuscript.
Brent Kim, Keeve Nachman, Shawn McKenzie, and Bob Lawrence at
CLF also provided input and review of this manuscript