In the mid-1960s, growing awareness of the environmental impact of many chemicals had led to a politically powerful environmental movement. Some labor leaders seized on the public's growing unease over chemicals in the environment, arguing that the effect of these compounds on worker health was even worse than the low-level exposure plants and animals received in the wild. On January 23, 1968, President Lyndon B. Johnson submitted a comprehensive occupational health and safety bill to Congress. Led by the United States Chamber of Commerce and the National Association of Manufacturers, the legislation was widely opposed by business. Many labor leaders, including the leadership of the AFL-CIO, supported the legislation, including testifying in support at congressional hearings. The legislation died in committee.