WM has the largest disposal network and collection fleet in North America, is the largest recycler of post‑consumer materials and is a leader in beneficial use of landfill gas, with a growing network of renewable natural gas plants and the most landfill gas‑to‑electricity plants in North America. Repair, Replace, or Rebuild Components: Conduct repairs and replacements on engines, transmissions, brakes, steering systems, electrical systems, and other mechanical components.