The Great Lakes are warming. Although it might make for better swimming, higher temperatures could have a disastrous effect on Lake Michigan’s game fish, like trout and salmon, which depend on cold water. Plus, we revisit a conversation with writer and educator Parker Palmer. His most recent book is called On The Brink Of Everything: Grace, Gravity and Getting Old.

The town of Quincy, Illinois is enjoying the spotlight after being featured in the popular Netflix makeover show Queer Eye. We talk to the band teacher who brought the Fab Five to Illinois. Also, it’s finally beach season. Even though we don’t live by the ocean, Lake Michigan is always a drive away. But it turns out the water is sometimes too dirty for swimmers. Plus, Chicago officials made it clear they won’t cooperate with the Trump administration’s current immigration deportation policy. That resistance harkens back to another era more than a century ago. And, we hear tips for making classic Chicago deep dish pizza at home.

On this encore edition of The 21st: Why it's so tough to keep the world's largest freshwater system clean. Plus, an interview with the mayor of Metropolis, Illinois.

An Asian Carp was caught recently in a place where it shouldn’t be – beyond an electric barrier meant to keep the species out of Lake Michigan and the rest of the Great Lakes. Researchers at Southern Illinois University are trying to figure out just how it got there. 

Fears that the invasive Asian carp could show up in the Great Lakes were renewed, when one of the fish was caught on June 22 near the T.J. O’Brien Lock and Dam in the Little Calumet River, just nine miles from Lake Michigan.