Nancy J. Schmitt
Several reasons present themselves as to why we need to pay attention to what is happening with the frogs. First, whether humans eat them directly or not, they are a key part of the food chain. If something happens to materially change their numbers, there will be some other creatures above them on the food chain that will go hungry. Additionally, the organisms upon which frogs feed will have lost their natural predator, increase in number, and create an unbalance. Changes to each of these creatures, plants, or organisms will have similar cascading effects.
Second, frog endocrine systems are very similar to those of humans. If there is something substantial happening to the frogs' endocrine systems, there is justifiable concern that humans are also being affected in some way.
The third reason is that the frogs breathe through their skin, making them very susceptible to toxins in the water. The problems the frogs are having indicates that there are toxins in the water, the very water that humans also drink and need to survive.