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Merrit Kennedy

People around the world use more than a trillion plastic bags every year. They're made of a notoriously resilient kind of plastic called polyethylene that can take decades to break down.

But the humble wax worm may hold the key to biodegrading them.

It was an accidental discovery. Scientist and beekeeper Federica Bertocchini was frustrated to find that her beehives were infested with the caterpillar larvae of Galleria mellonella, commonly known as a wax worm.

North Korea marked Tuesday's anniversary of the founding of its military with artillery drills, celebrations that took place as a U.S. guided missile submarine docked in South Korea and U.S. Navy ships conducted exercises with South Korea and Japan.

Meanwhile, envoys from the U.S., South Korea and Japan met in Tokyo to discuss the rising tensions with the rogue nation and "map out further punishment if the North goes ahead with more nuclear or missile tests," NPR's Anthony Kuhn reports.

After years of legal wrangling and intimidation, New Orleans has begun the process of dismantling four monuments of the Confederate and Jim Crow eras.

The first monument, which honors members of a white supremacist paramilitary group who fought against the city's racially integrated, Reconstruction-era police force in 1874, was dismantled and removed before the sun rose Monday.

Following death threats, the contractors wore flak jackets and helmets as they broke down the Battle of Liberty Place monument, as WWNO's Tegan Wendland reports.

Afghanistan's defense minister and its army chief of staff stepped down in the wake of a Taliban-claimed attack Friday in which at least 100 Afghan soldiers died. It was one of the deadliest attacks in Afghanistan since 2001.

Afghan President Ashraf Ghani announced the high-level resignations Monday, on the same day that U.S. Secretary of Defense James Mattis arrived in the country on an unannounced visit, as the Trump administration reviews its Afghanistan policy.

Louisiana Gov. John Bel Edwards has declared a state of emergency over the state's rapidly eroding coastline.

It's an effort to bring nationwide attention to the issue and speed up the federal permitting process for coastal restoration projects.

"Decades of saltwater intrusion, subsidence and rising sea levels have made the Louisiana coast the nation's most rapidly deteriorating shoreline," WWNO's Travis Lux tells our Newscast unit. "It loses the equivalent of one football field of land every hour."

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