; (2) to vary the capability of individual manufacturing facilities to accommodate different battery chemistries and configurations; (3) to reduce waste streams, emissions, and energy intensity of vehicle, engine, advanced battery, and component manufacturing processes; (4) to recycle and remanufacture used batteries and other vehicle components for reuse in vehicles or stationary applications; (5) to develop manufacturing processes to effectively fabricate, assemble, and produce cost-effective lightweight materials such as advanced aluminum and other metal alloys, polymeric composites, and carbon fiber for use in vehicles; (6) to produce lightweight high pressure storage systems for gaseous fuels; (7) to design and manufacture purpose-built hydrogen fuel cell vehicles and components; (8) to improve the calendar life and cycle life of advanced batteries; and (9) to produce permanent magnets for advanced vehicles. 8. Medium- and heavy-duty commercial and transit vehicles program The Secretary, in partnership with relevant research and development programs in other Federal agencies, and a range of appropriate industry stakeholders, shall carry out a program of cooperative research, development, demonstration, and commercial application activities on advanced technologies for medium- to heavy-duty commercial, vocational, recreational, and transit vehicles, including activities in the areas of— (1) engine efficiency and combustion research; (2) onboard storage technologies for compressed and liquefied natural gas; (3) development and integration of engine technologies designed for natural gas operation of a variety of vehicle platforms; (4) waste heat recovery and conversion; (5) improved aerodynamics and tire rolling resistance; (6) energy and space-efficient emissions control systems; (7) mild hybrid, heavy hybrid, hybrid hydraulic, plug-in hybrid, and electric platforms, and energy storage technologies; (8) drivetrain optimization; (9) friction and wear reduction