Develops and pursues regional strategies for the development, protection and advancement of the interests of member Tribes and their people in the areas represented by ATNI committees which include: cultural affairs, economic development, human and social services, natural resources and environment, Tribal governance, and ad hoc task forces. Each committee and task force shall determine its own mission and course consistent with the operating policies and principles of the Affiliated Tribes.

An environmental conservation agency that uses innovative approaches to protect healthy land, clean water and fresh air; connect people to the land; support local agriculture; and be a role model for the Methow Valley.

Helps to protect water quality and wildlife habitat through action-based educational activities. Volunteer opportunities include: - rescuing plants from areas slated for new development, - streamside vegetation projects, - installing and maintaining learning landscapes at area schools, - fundraising and assisting with public workshops on plant identification, - "naturescaping" and propagation.

PlantAmnesty Arborists volunteer their time to prune majestic old trees in the King County area mainly for nonprofit organizations or people who cannot afford the pruning.