A Huge Cave in Kentucky Was a Smelly Disaster. Now It’s Spectacular.

Hidden River Cave was once filled with heavy metals and sewage that made the surrounding town smell awful. After a cleanup, it became a tourist draw.

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United Nations Plastic Treaty Talks End Without Deal

Countries failed to bridge wide gaps on whether the world should limit plastic manufacturing and restrict the use of harmful plastic chemicals.

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Why the World Is Deadlocked Over a Treaty to Stop Plastics Pollution

After three years of talks, and despite growing warnings about the dangers of plastics pollution, nations are at an impasse again over what to do about it.

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Bird Flu May Be Airborne on Dairy Farms, Scientists Report

In unpublished research, researchers found live virus on equipment, in wastewater and in the air in so-called milking parlors.

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E.P.A. Delays Required Cleanups of Toxic Coal Ash Landfills

The Trump administration will give utilities around the country an additional year to come up with a plan to clean up contaminated waterways.

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Philadelphia Public Workers Reach Deal to End Strike

The city’s largest public sector union and the mayor reached a tentative deal, ending a work stoppage that led to piles of trash on the streets.

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Trash Overflows in Philadelphia as City Workers’ Strike Enters Second Week

Pungent odors permeate the City of Brotherly Love as a contract impasse between the city and the American Federation of State, County and Municipal Employees continues.

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Manila’s Mayor Returns to Office to Face Mountains of Trash

Mayor Francisco Domagoso declared a state of emergency in the Philippine capital with piles of garbage left uncollected by contractors saying they had not been paid.

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The U.S. Sends Lots of Plastic Trash Overseas. Malaysia Just Said No Thanks.

No country receives more discarded plastic from wealthy countries, but shipments from the United States are no longer welcome.

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Nate Morris, Wealthy Business Executive, Enters Senate Race in Kentucky

Mr. Morris, a founder of a waste and recycling business, describes himself as the only political outsider in the field and an unwavering supporter of President Trump.

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