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Amsterdam Trials Bubble Barrier to Clean River Waste
Amsterdam is trying out a “bubble barrier” to help remove plastic from the city’s canals by capturing trash hidden beneath the surface of the water.

“A bubble barrier is basically a tube that we place on the bottom of the river or canal, that has holes in it and we press air through it; that creates a bubble curtain,” said Francis Zoet, the Great Bubble Barrier project’s technical director.

While Amsterdam already has four boats that collect around 42,000 kg of plastic a year, the boats can only pick up the rubbish on the surface and some smaller pieces are missed altogether. The bubbles work with the flow of water in the canal to float the waste to surface so it can be collected by the debris skimmer boats.

 
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$200 Million Barriers May Not Keep Silver Carp out of Lake Michigan - The silver carp was deliberately brought to the United States during the 1970s to help clean up pollution in fish farms. They weren’t expected to escape, and at the time it was believed that the fish couldn’t successfully reproduce in American waters. As it happened, silver carp can make it just fine in the wild.


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