Peat Moss Revival: Sudbury's Mining Scars Healed?

In 2024, a novel peatland restoration project began in Sudbury, Ontario, where researchers transplanted approximately 35 tonnes of peat to a wetland. This initiative aims to re-establish sphagnum moss, or peat moss, which had been eradicated by toxic metals from mining industry emissions over many years. This ambitious effort is the first attempt to restore peat moss in an area significantly impacted by mining.

Researchers are evaluating three agricultural techniques to foster new growth. While definitive results will take three to eight more years, early greenhouse experiments and observations in the actual wetland show encouraging signs of peat moss survival. One method, using cut peat moss as a support bed, is showing particularly promising early success.

Restoring peatlands is crucial as they are highly effective carbon sinks, far more so than boreal forests. In Sudbury, degraded peatlands emit methane, a potent greenhouse gas. Peat moss also acts as a vital fire barrier. This project represents a significant step in Sudbury's long-term environmental recovery, building on the city's famous regreening efforts that have planted over 10 million trees since the late 1970s. The scale of restoring an estimated 6,000 to 8,000 hectares of affected peatland presents considerable challenges, potentially leading to innovations like helicopter-dropped peat moss pellets.