What is the fine-grained topic of the following text: Alesia Maltz, doctoral program director in the Department of Environmental Studies, who teaches the course, said the Ramapough face a “classic environmental justice situation.” The tribe’s historic lands were contaminated by paint sludge from a Ford Motor Co. plant in the 1950s and 60’s; now their lands are under threat from the proposed expansion of a nearby natural gas pipeline. Only return the topic.
The Ramapough tribe's environmental justice issues due to land contamination and natural gas pipeline expansion.