Trash lines the gutter on Bourbon Street, in the early hours of the morning after Mardi Gras, in New Orleans, Feb. 18, 2015. It’s a beloved century-old Carnival season tradition in New Orleans — masked riders on lavish floats fling strings of colorful beads or other trinkets to parade watchers clamoring with outstretched arms. It's all in good fun but it's also a bit of a “plastics disaster,” says Judith Enck, a former Environmental Protection Agency regional administrator and president of the advocacy group Beyond Plastics. (AP Photo/Gerald Herbert, file)
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