Liu's study showed that, after remarriage, average household size and the number of rooms per person returned to the level of households that had stayed married the whole time.
To Dr. Maureen Lichtveld, chairwoman of the department of environmental health sciences at Tulane University School of Public Health and Tropical Medicine, the findings are another example of the inextricability of humans and their habitat.
"In order to find sustainable solutions for environmental health issues, we must take a holistic approach and that holistic approach requires looking at both the environment in the traditional sense of the word and the environment from the human health aspect," she said.
To measure your own ecological footprint, take this quiz from the Global Footprint Network.
SOURCES: Jianguo "Jack" Liu, Ph.D., Rachel Carson chair in sustainability, Michigan State University, East Lansing; Maureen Lichtveld, M.D., professor and chair, department of environmental health sciences, Tulane University School of Public Health and Tropical Medicine, New Orleans; Dec. 3-7, 2007, Proceedings of the National Academy of Sciences
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