What is the fine-grained topic of the following text: The Abandoned Mine Lands (AML) Program is focused on mitigating potential human health and ecological concerns associated with contamination from legacy heavy metal mining operations (inactive or abandoned mine lands) occuring primarily prior to September 1, 1989. Only return the topic.
The Abandoned Mine Lands (AML) Program and its focus on mitigating health and ecological issues from legacy heavy metal mining operations.