![Selene Hernandez-Ruiz at the age when she caught many fireflies during summer visits to see her grandmother. Now the manager of Denver’s water quality lab, Hernandez-Ruiz has worried about clean water and the environment since she was a child in Mexico. Photo credit: Selene Hernandez-Ruiz.](/sites/default/files/tap_featured_images//Selene-Hernandez-Ruiz-1.jpg)
Selene Hernandez-Ruiz at the age when she caught many fireflies during summer visits to see her grandmother. Now the manager of Denver’s water quality lab, Hernandez-Ruiz has worried about clean water and the environment since she was a child in Mexico. Photo credit: Selene Hernandez-Ruiz.