Cotton fabric, whether virgin or recycled, breaks down almost completely in soil within four months, while polyester fabric shows no signs of decomposing even after seven months.
1
100% cotton and cotton/recycled-cotton blend fabrics degraded 93-95% after just 1 month and were completely gone by 4 months.
2
100% polyester and 100% recycled polyester fabrics showed no measurable degradation after 1, 4, or 7 months of soil burial.
3
Recycled fibers behaved just like their virgin counterparts: recycled cotton degraded as readily as virgin cotton, and recycled polyester stayed as inert as virgin polyester.
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