All the ingredients used are being re-used

Environmental Philosophy
Trex brings together wood and plastic fibres to create a superior alternative to wood derived from reclaimed and recycled resources.  These include sawdust and used pallets from woodworking operations, as well as recycled plastic grocery bags.  It is in fact one of the largest plastic bag recyclers in the United States.

Sustainable Processes
Not only does Trex single-handedly prevent thousands of tons of wood and plastic scrap from heading to landfills each year, but Trex also ensures that the manufacturing process is as green as the final product.  Trailers are hydraulically-powered with vegetable-based oil, the proprietary processing method eliminates the need for smokestacks, and factory runoff/ refuse is recycled back into the manufacturing process.  Finally, much of Trex’s packaging materials are made from recycled paper and plastic.