Meanwhile, the total fertility rate worldwide has dropped by nearly 1 percent per year from 1960 to 2018. The annual 1 percent decline in reproductive health is faster than the rate of global warming (thankfully! )—and yet people are up in arms about global warming (and rightly so) but not about these reproductive health effects. The truth is, these reproductive health effects are interconnected, and they are largely driven by a common cause: the presence of hormone-altering chemicals (a.k.a., endocrine-disrupting chemicals, or EDCs) in our world. This cluster of related reproductive problems—for both men and women—is presenting huge challenges to the world’s population.