The federal government says nearly six trillion pounds of chemicals are produced every year for industrial and agricultural use. According to an investigation by two journalists, some chemical companies are not above manipulating scientific studies to win legal approval. Dan Fagin is the environment writer at Newsday in New York City who teamed up with Marianne Lavelle of the National Law Journal to write a new book called, “Toxic Deception: How the Chemical Industry Manipulates Science, Bends the Law and Endangers Your Health.” Mr. Fagin says he began his research by looking at how the funding of scientific studies on chemical safety may affect the results.