About the Authors

Linus Blomqvist

linus@thebreakthrough.org

Affiliation Breakthrough Institute, Oakland, California, United States of America

Barry W. Brook

Affiliation The Environment Institute and School of Earth and Environmental Sciences, The University of Adelaide, Adelaide, South Australia, Australia

Erle C. Ellis

Affiliation Department of Geography and Environmental Systems, University of Maryland Baltimore County, Baltimore, Maryland, United States of America

Peter M. Kareiva

Affiliation The Nature Conservancy, Seattle, Washington, United States of America

Ted Nordhaus

Affiliation Breakthrough Institute, Oakland, California, United States of America

Michael Shellenberger

Affiliation Breakthrough Institute, Oakland, California, United States of America

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.