Laurie Valeriano first heard about DINP decades ago. "I started to worry about the chemicals that come out of all these plastics," she said. DINP, one of a group of chemicals called phthalates that makes plastic more pliable, was one of them. It was already clear that DINP could cause cancer and interfere with hormonal functioning. In February 2000, Valeriano and her employer, the Washington Toxics Coalition, asked the Environmental Protection Agency to add DINP to the list of chemicals it monitors through a nationwide program called the Toxics Release Inventory. Seven months later ... the EPA announced that it planned to grant the group's request and issued a proposed rule that would add DINP to the toxics inventory. Yet more than 20 years later, the EPA has yet to make good on its promise to add DINP to the list of chemicals. It never finalized the rule. Companies have continued to churn out DINP ... in astounding amounts without disclosing how much individual plants make and emit. In addition to the cancer and hormone disruption that sparked Valeriano's claim 21 years ago, we now know more about how DINP affects the sexual development of children. It decreases sperm motility, increases malformations of the testes and other organs, and makes boys ... more likely to be infertile later in life. In fact, the entire group of phthalates an estimated half-billion pounds of which are made and used in the U.S. each year " seem to cause a similar constellation of health problems.