About the Authors
- Noel P. Gurwick
- Smithsonian Environmental Research Center. Edgewater, Maryland, United States of America
- Lisa A. Moore
- Environmental Defense Fund, San Francisco, California, United States of America
- Charlene Kelly
- Western Carolina University, North Carolina, United States of America
- Patricia Elias
- Union of Concerned Scientists, Washington, District of Columbia, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: NPG LAM PE. Analyzed the data: NPG LAM CK. Wrote the paper: NPG LAM.