About the Authors

Linus Blomqvist, Ted Nordhaus, Michael Shellenberger
Breakthrough Institute, Oakland, California, United States of America

Barry W. Brook
The Environment Institute and School of Earth and Environmental Sciences, The University of Adelaide, Adelaide, South Australia, Australia

Erle C. Ellis
Department of Geography and Environmental Systems, University of Maryland Baltimore County, Baltimore, Maryland, United States of America

Peter M. Kareiva
The Nature Conservancy, Seattle, Washington, United States of America

Corresponding Author

linus@thebreakthrough.org

Competing Interests

This Formal Comment is a response to Rees and Wackernagel (this issue) by the authors of the original Perspective “Does the Shoe Fit? Real versus Imagined Ecological Footprints” (this issue).

Author Contributions

The author(s) have made the following declarations about their contributions: Wrote the paper: PK LB EE BB TN MS.