Northern Dogs Forum has a message train that talks about a bad situation in Alaska where salmon have not returned to spawn. This is causing a problem for locals who depend upon the fish as a food source for their husky population. They are shooting their own dogs rather than let them starve to death due to the shortage. The most chilling entry is this message thread is the last line of this message, "....we have messed up big-time, and the fish are gone..."
Think about that. Close your eyes, and imagine the anguish of knowing that something we have done to the environment has caused this catastrophe. Rather than waxing poetic about it, I'll just let you stew on how deep a meaning that could have, and how it could happen to any of us.