A diagram reveals how the hills were constructed, with layers of fill (including recycled demolition debris and lightweight pumice) and horticultural soil creating the slope, plus a series of mats, biodegradable logs, and fences to prevent erosion.  Photo 5 of 6 in New York's Newest Park Sits on Recycled Demolition Debris

New York's Newest Park Sits on Recycled Demolition Debris5/6

A diagram reveals how the hills were constructed, with layers of fill (including recycled demolition debris and lightweight pumice) and horticultural soil creating the slope, plus a series of mats, biodegradable logs, and fences to prevent erosion.

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