The best way to simulate recycling in En-ROADS is to moderately adjust the following sliders:

1. Buildings and Industry Energy Efficiency (less energy is used to produce new materials and goods)

2. Waste and Leakage, adjusting advanced settings of "Methane and nitrous oxide from waste” and “Nitrous oxide from industry” (less new materials, especially plastic, is produced)

More extensive analysis is needed to understand the exact amount you should move the sliders to simulate these approaches. It is safe to assume that recycling and plastic reduction can only compensate for a small portion of the action represented by these sliders.