Environment

Sea ice in the Arctic has been melting at a record-breaking pace. Scientists blame a warming climate for most of that, but researchers have now teased out a natural cycle for how Arctic sea ice melts year-to-year.

Based on that cycle, they conclude that 30 percent to 50 percent of the melting is due to natural causes, while human-caused warming is responsible for the rest.

As a snow advisory hovers over the region, the Milwaukee River has taken on a strange and ever-changing look.

It looks like a gooey concoction, but according to Milwaukee Riverkeeper, the topping is rapidly forming ice called "pancake."

"Because the river has been wide open due to warm temps, and temps have dropped, it's starting to ice up again," says Riverkeeper Cheryl Nenn, explaining what people might be noticing floating down the river toward Lake Michigan.

Susan Bence / Milwaukee Public Radio

Jacqui Patterson works in communities around the country to engage African-Americans on climate issues. She directs the NAACP Environmental and Climate Justice Program and helped build the program from the ground up.

Pat Rabinson

Milwaukee Water Commons was created four years ago to educate the community about water - its rivers, streams and Lake Michigan - to cultivate informed stewards.

“I came from a more traditional environmental effort, which was the Milwaukee River Greenway Coalition – working to make the river more beautiful, more accessible. There was already a ton of passion around that issue, but it was by and large a middle class and white group of people,” founder Ann Brummitt says.

David Flowers

Milwaukee native Davita Flowers-Shanklin brings a unique experience to the discussion of segregation, and its ripple effects.

“I remember being in high school and being really into science and biology. I was the co-director of Camp Everytown, which is a diversity camp for teenagers," Flowers-Shanklin says. "So my work even as a teenager was around anti-oppression."

President Trump's head of the Environmental Protection Agency says he does not believe that carbon dioxide is a major cause of global warming.

"I would not agree that [CO2] is a primary contributor to the global warming that we see," Scott Pruitt said Thursday in an interview with CNBC's Joe Kernen.

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Now, it's no surprise that Neanderthals didn't brush their teeth. Nor did they go to the dentist.

That means bits of food and the microbes in their mouths just stayed stuck to their teeth. While not so good for dental hygiene, these dental plaques are a great resource for scientists interested in understanding more about Neanderthal diet and lifestyle.

Georgetown, Texas, is a conservative town in a conservative state. So it may come as something of a surprise that it's one of the first cities in America to be entirely powered by renewable energy.

Mayor Dale Ross, a staunch Republican who attended President Trump's inauguration, says that decision came down to a love of green energy and "green rectangles" — cash.

At least a dozen wildfires burning in Colorado, Texas, Kansas, Oklahoma and Florida have charred more than 1,700 square miles and remain largely uncontained.

Rachel Hubbard of member station KOSU in Oklahoma City, Okla., reported at least six people have died in the wildfires:

Susan Bence / Milwaukee Public Radio

Segregation impacts many different areas of our lives in metro Milwaukee. One that may not be top of mind is its connection to environmental health and justice. WUWM found an intricate tapestry of challenge and hope -- starting with Antoine Carter.

His childhood started on East Chambers in Milwaukee.

“I remember drugs and gangs and outdoor football and people getting jumped and all sorts of stuff. Just living in this area in the 1990s, I was a little too young to understand everything that was going on, but I still could see that things weren’t right,” Carter says.

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Copyright 2017 NPR. To see more, visit http://www.npr.org/.

A federal judge has denied a request by the Standing Rock Sioux and Cheyenne River tribes to halt construction of the final piece of the Dakota Access Pipeline.

According to two new World Health Organization reports, about 1.7 million children under the age of 5 die each year because of environmental hazards. It's the first such estimate of the child death toll from environmental causes.

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