Editorial

Why Is Grass Green?
Michael Dieter
P. 1004

Environews

Forum

EMFs: Breast Cancer Culprits?
Tree of Life
Asthma Gene Is Nothing to Sneeze at
Making Headlines on Health
Pesticides and Food Safety
ER Gene Disruption Is a Knockout
P. 1008

Focus

A Continent in Chaos: Africa's Environmental Issues
P. 1018
The Price of Progress: Environmental Health in Latin America
P. 1024

Environmental Health: The Global Report Card, 1994
P. 1030

p53 in 3-D
P. 1034

Asbestos and Colon Cancer: A Weight-of-the-Evidence Review
John F. Gamble
P. 1038

• Lead Alters the Immunogenicity of Two Neural Proteins: A Potential Mechanism for the Progression of Lead-induced Neurotoxicity
  Stacey J. Waterman, Hassan A.N. El-Fawal, and Carroll A. Snyder
  P. 1052

• Intestinal Absorption of Dietary Cadmium in Women Depends on Body Iron Stores and Fiber Intake
  Marika Berglund, Agneta Åkesson, Barbro Nermell, and Marie Vahter
  P. 1058

• Modulation of Bronchial Epithelial Cell Barrier Function by in vitro Ozone Exposure
  Xiao-Ying Yu, Nobuyoshi Takahashi, Thomas L. Croxton, and Ernst W. Spannhake
  P. 1068

• Human Nasal Mucosal Changes after Exposure to Urban Pollution
  Lilian Calderon-Garcidueñas, Antonio Rodriguez-Alcaraz, Raquel Garcia, Gabriela Sanchez, Gerardo Barragan, Rosaura Camacho, and Leticia Ramirez
  P. 1074

• Evaluation of Dermal and Respiratory Chloroform Exposure in Humans
  Benoît Lévesque, Pierre Ayotte, Alain LeBlanc, Éric Dewailly, Denis Prud'Homme, Robert Lavoie, Sylvain Allaire, and Patrick Levallois
  P. 1082

  Evaluating Health Risks from Occupational Exposure to Pesticides and the Regulatory Response
  Tracey J. Woodruff, Amy D. Kyle, and Frédéric Y. Bois
  P. 1088