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doi:10.1126/science.301.5633.595a

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Science 1 August 2003:
Vol. 301. no. 5633, p. 595
DOI: 10.1126/science.301.5633.595a

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Letters

Letters in This Issue


	Science Editor Bias on Climate Change S. Fred Singer. Response Donald Kennedy
	Dating the Sterkfontein Fossils R. J. Clarke, T. C. Partridge, D. E. Granger, M. W. Caffe. Response Ann Gibbons
	Politically Correct or a Bad Decision? Leonid V. Azaroff
	Early U.S. Interest in Hypersonic Flight Steven T. Corneliussen
	Technical Comment Abstracts

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Technical Comment Abstracts

Comment on "Obesity and the Environment: Where Do We Go from Here?"
Nancy F. Butte and Kenneth J. Ellis

Abstract: In light of observed changes in weight and body composition, halting the epidemic of childhood obesity cannot be achieved with "small changes" in diet and/or physical activity, as suggested by Hill et al. (Viewpoints, 7 February 2003, p. 853). Closing the energy gap will require significant and concerted societal effort to change the way our children are eating and increase their physical activity.

Full text at www.sciencemag.org/cgi/content/full/301/5633/598b

Response to Comment on "Obesity and the Environment: Where Do We Go from Here?"
James O. Hill, Holly R. Wyatt, George W. Reed, John C. Peters

Abstract: Reducing positive energy balance by 100 kcal/day could prevent weight gain in most adults. A similar strategy of targeting small behavior changes may prevent excessive weight gain in children and adolescents. Even if changes of 200-300 kcal/day are required in high-risk individuals, the strategy of starting with small changes should be considered.

Full text at www.sciencemag.org/cgi/content/full/301/5633/598c