What act is designed to ensure workplace safety and health?

The Occupational Safety and Health Act is designed to ensure workplace safety and health by establishing occupational safety and health standards to protect employees from potentially hazardous conditions in the workplace. It created the Occupational Safety and Health Administration (OSHA), which is responsible for enforcing these standards, conducting inspections, and providing education and training on health and safety practices. The act emphasizes the employer's responsibility to provide a safe working environment and to comply with safety regulations, thereby minimizing risks of injury and illness for workers across various industries.

The other options do not pertain directly to workplace safety. The Atomic Energy Act primarily governs the use and regulation of nuclear energy and materials, while FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) regulates pesticide use and safety. The Marine Protection, Research, and Sanctuaries Act focuses on the protection of ocean waters and marine life, rather than workplace environments.