71.   Now for the first time a Southern California study links air pollution and birth defects.

72.   Numerous studies have linked POPs with an array of health problems, ranging from cancer to disorders of the nervous system to low sperm counts in men.

73.   Previous studies have linked low birth weight to problems with brain development in children.

74.   Previous studies have linked the midbrain, the ventral striatum and parts of the cortex to sex and food.

75.   Previous studies link many factors to Suds, such as low potassium and ventricular fibrillation, while identifying stress and risky lifestyles as some of the triggers.

76.   Previous studies have linked high meat intake to colorectal cancer, but almost all the studies grouped fresh and processed meats together.

77.   Scientific studies have linked PCBs, or polychlorinated biphenyls, to cancer.

78.   Some previous studies have linked estrogen supplements, either alone or combined with progestin, with higher rates of breast cancer.

79.   Study links leukemia cases with French nuclear plant.

80.   Studies had linked these chemicals to a thinning of the natural ozone layer in the upper atmosphere.