I work as an environmental engineer, focusing on water resources. Contaminants produced by the coal industry, such as mercury, lead and other heavy metals, are harmful to human health, and extremely persistent once they're introduced to the environment. Source control is the most effective, and overall least expensive, way to maintain endpoint water quality standards for the millions of people who's drinking water is pulled from aquifers downstream of these mines. This doesn't only effect surface streams. Runoff from coal mines infiltrates into the water table, which makes it a health risk to the millions of people in rural areas who rely on wells for drinking water. Do you know how hard it is to treat entire aquifers for pollution? A lot harder than restricting industry from creating that pollution. High levels of environmental mercury will propagate up aquatic food chains as well, which can make fish unsafe to eat states away from the sources of contamination. The rights of the coal industry to pollute are absolutely overshadowed by the rights of the people to have access to clean water. If an entire industry can't stay solvent without endangering the health of the public, those jobs belong elsewhere.