What a clever idea, to make floating platforms full of riparian vegetation that replaces the plant life formerly growing along industrialized waterfront areas - it helps absorb nitrogen and phosphorus (which decreases toxic algal blooms) and filters the water, and provides marine habitat. And, they make the containers out of floating logs that have been removed because they were a marine navigation hazard - so they know the logs will continue to float even when they're waterlogged.
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