Science helps keep us safe and healthy. The public safeguards that keep our drinking water clean and our children’s toys safe rely on independent science and a transparent policymaking process. And we all rely on scientific information to make informed choices about everything from what we eat to what consumer products we buy for our families. But the results of independent science don’t always shine a favorable light on corporate products and practices. In response, some corporations manipulate science and scientists to distort the truth about the dangers of their products, using a set of tactics made famous decades ago by the tobacco industry. In a new guide called The Disinformation Playbook, the Union of Concerned Scientists describes five of the most widely used “plays” and some of the many cases where they have been used to block regulations or minimize corporate liability, often with frightening effectiveness—and disastrous repercussions on public health and safety.