Can chemically treated pine outdoor bar stools harm garden ecosystems?

Chemically treated pine outdoor bar stools are popular for their durability and resistance to rot, but their impact on garden ecosystems is a growing concern. The preservatives used—such as copper azole or alkaline copper quat—can leach into soil over time, potentially harming beneficial microorganisms and plant health. While modern treatments are less toxic than older methods like chromated copper arsenate (CCA), prolonged exposure may still disrupt soil balance. To minimize risks, consider sealing the wood or opting for naturally rot-resistant alternatives like cedar or redwood. Proper placement away from edible plants and regular maintenance can also reduce environmental harm. Always check local regulations on treated wood use in outdoor settings.