Greenwood has been found to conform to FSC standard:
FSC-STD-40-004 ver 3.0
What is FSC Certification?
The Forest Stewardship Council (FSC) is an international non-profit, multi-stakeholder organization established in 1993 to promote responsible management of the world’s forests. The FSC does this by setting standards on forest products, along with certifying and labeling them as eco-friendly.
Forest management certification is a voluntary process for verifying responsible forest practices. It is up to a forest owner, or representative of a group of forest owners and operators, to initiate the certification process by requesting an independent certifier to inspect the forest and to see if the management meets the FSC requirements, encapsulated in the FSC P&C. Only an FSC accredited certification body can evaluate, monitor and certify companies to FSC standards, and only continuous compliance can assure that certificate holders can keep their certificates; these holders are charged an annual fee to renew their accreditation.
The FSC P&C apply to all tropical, temperate and boreal forests and many to plantations and partially replanted forests. Though mainly designed for forest management for timber products, they are also largely relevant for non-timber products (e.g. Brazil nuts) and other environmental services such as clean water and air and carbon sequestration. The FSC Principles are a complete package and their sequence does not represent an ordering of priority.