How to Save Your Sperm

Is humanity killing itself off? In a study published last week, a team of epidemiologists found that sperm counts among men in the United States, Europe and Australia have declined by more than 50 percent between 1973 and 2011. Alongside the deleterious effects of cigarette smoke, especially during critical stages of prenatal development, the authors of the study point out that exposure to certain synthetic chemicals has been associated with decreased fertility.