Environmental security projects under the direction of the Department of Defense Army Corps of Engineers and Navy Seabees led by Secretary Elizabeth Warren, starting with:
Installation of a system to protect and conserve potable water to create separate primary, secondary, and tertiary water resource management programs.
Environmental preservation projects under the direction of the Department of Homeland Security (perhaps led by Michelle Obama?) starting with High-Speed Rail that utilizes the two center lanes of every interstate in the country. Express and local stops utilize overpass exits for pedestrians at all stops, underpass exits for wheelie users (skates, cycles, scooters, et al), concomitant with promoting expedient leisure class train travel at home and abroad by the re-connection of Amtrak with the National Parks Service.
Make revitalization of Amtrak's rolling stock and revival of its first-class service completely affordable by restoring its mail-carrying function.
Added benefit: Lowering the cost of transporting mail not incidentally protects the function of the US Post Office!