6. Princess Chulabhorn Walailak of Thailand
A chemist and medical researcher, Princess Chulabhorn has focused on genetic toxicology and the chemistry of natural products, studying, among other things, the health risks that air pollution poses to traffic police in Bangkok. She founded the International Center for Environmental and Industrial Toxicology, which was designated by the U.N. Environment Program as “a Center of Excellence,” and the Chulabhorn Research Institute, which trains scientists and searches for solutions to problems related to the environment, agriculture, and health. In 2002, she was awarded the Environmental Mutagen Society Hollaender International Fellowship [PDF]. She has served as a special adviser to the U.N. Environment Program and was named by the U.N. to direct the Center of Excellence for Environmental and Industrial Toxicology.