One of the most famous and vocal climate scientists is speaking out, again. Penn State researcher and author Michael Mann was recently asked by Democrats to be a witness at a hearing on climate science. It was held by the House Committee on Science, Space and Technology. Mann called the other three witnesses fringe experts because they were questioning the science behind climate change.

Three years ago today, the city of Flint switched to the Flint River for its drinking water. We all know how that story goes. So now, three years later, how has what happened in Flint changed the way we look at our drinking water?

A lot of different chemicals end up in our rivers and streams. Researchers are finding these mixtures of chemicals are more complex than we thought, and it could hurt fish and other creatures.

This year’s Winter Study of the wolves and moose of Isle Royale found that there are still just two wolves hanging out on the island.

Pollution and other problems plague areas all over the Great Lakes region, and they can make drinking or swimming dangerous. There’s plenty of blame to go around for this – city water utilities, agriculture, and politicians to name a few. Now an unlikely industry has joined the search for solutions: technology is taking on Lake Erie.

Tomorrow evening at 7pm, the Michigan Department of Environmental Quality is holding a public hearing on a request from Nestle Waters.

Some government websites are changing what they say about the environment, and a group of researchers is keeping track. Researchers in the U.S. and Canada are continuing to back up scientific data from federal agencies in the U.S. They’re also keeping a close eye on how information is changing on federal websites like the EPA, the State Department and the Department of Energy, along with other federal agency sites, and they've been finding changes are happening.

Fish consumption advisories usually focus on one chemical at a time – like mercury – and these advisories tell you how much of each kind of fish you should eat, and what to avoid. But they don’t often tell you much about mixtures of different chemicals in the environment that could be in fish.

Most of us don't think about how much electricity costs at different times of the day. But the state's two largest utilities are planning to change that. When it's really, really hot and humid out, what do lots of people do when they get home? They turn on, or turn up, the air conditioning. There are big spikes in electricity demand on the hottest summer days, between 2:00 in the afternoon to 7:00 in the evening. And that electricity is really expensive to produce. DTE Energy and Consumers

The buildup of nutrients in western Lake Erie can trigger algae growth – and contaminate drinking water in nearby cities. That happened as recently as 2014, when Toledo residents could not drink their water for two days.