Final answer:
Hazardous waste legislation began in the 1970s with the Resource Conservation and Recovery Act (RCRA) of 1976, establishing regulations for handling hazardous wastes to safeguard public health and the environment.
Explanation:
The hazardous waste legislation first started to go into effect in the 1970s. The Resource Conservation and Recovery Act (RCRA) of 1976 was a significant law that established regulations for handling hazardous wastes, aiming to protect public health and the environment. This legislation marked a crucial step towards managing solid and hazardous waste effectively.
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