When selecting wood for public park benches, sustainability is paramount. The most responsible choice is wood certified by the Forest Stewardship Council (FSC). FSC certification guarantees the timber is harvested from responsibly managed forests that prioritize biodiversity, ecosystem health, and workers' rights.
For durability, naturally long-lasting hardwoods like teak or white oak are excellent, though their sourcing must be verified. Alternatively, thermally modified woods (like ash or pine) offer enhanced rot resistance without chemicals. Locally sourced species reduce transportation emissions and support local ecology.
Ultimately, the "most sustainable" wood combines third-party certification (FSC), inherent durability for long life, and local availability. This ensures your benches are an eco-friendly investment that withstands the elements for years, minimizing environmental impact and future replacement needs.