Final answer:
The AQMG serves as the main resource on air pollution modeling techniques within the EPA, works with the ORD on model and technique development, and contributes analyses for the OAQPS's policy and regulatory decisions.
Step-by-step explanation:
The mission of the AQMG (Air Quality Modeling Group) is primarily to act as the central resource on air pollution modeling techniques for various branches of the Environmental Protection Agency (EPA), including EPA headquarters staff, regional offices, as well as state and local environmental agencies. The AQMG is responsible for coordinating with the EPA's Office of Research and Development (ORD) on the development of innovative models and techniques, and on broader atmospheric research challenges. Additionally, the AQMG provides essential modeling analyses that aid in shaping the policy and regulatory decisions made by the EPA's Office of Air Quality Planning and Standards (OAQPS).