Treatment ponds were the answer to a problem that briefly threatened the creation of the memorial itself. How they came to be still carries weight for the people involved in the work.
Conservationists hope that the listing of the monarch as endangered by an international group will inspire Pa. lawmakers to protect land for the butterfly.
A conservation group is working to save the bird that relies on human-made colonies, as it faces a loss of habitat, invasive species and climate change.
