The partial federal government shutdown could have wide-ranging consequences for the Great Lakes. There already are some problems, but things could get worse if the shutdown drags on.

Some cities in Michigan could lose half of all their trees due to disease or pests. Foresters are working to reduce the potential devastation. “So, I just wanted to show you, this is a neighborhood with old maple trees," Kerry Gray said as she led the way down a tree-lined street in Ann Arbor. She's the urban forester for the city. She’s worried about losing a lot of the city’s trees to a pest or disease. It’s happened before.

Soon, you’ll start seeing your energy bills start to rise each month because of the cold weather. That’s never fun. But, you might be paying a lot more than necessary to heat your home. We decided to look into whether a new efficient furnace adds up to much in the way of energy savings.

The State of Michigan is finding industrial chemicals known as PFAS in the tissue of fish. So it's been issuing “Don’t Eat the Fish” advisories along lakes, rivers and streams. But there are concerns about whether state officials are doing as much as they should. Before we get too far into the story, we have to start with a little science. The reason PFAS chemical contamination in fish is such a concern is because of something called bioaccumulation . If there is a toxic substance in the river,