Denver International Airport’s (DEN) “Zero Waste Valet” program has diverted 69.2 tons of material from the landfill into compost and recycling in its first six months of operation. The pilot program, which launched in June, 2024, has achieved an average waste diversion rate of 71% – or the rate at which trash is kept out of the landfill - three times higher than the airport's facility-wide diversion rate.