South facing windows
Coupled with proper eve overhangs let in winter sun, and shade windows in the summer.
Interior trombe wall
Soak up heat in the winter months from direct sunlight through the south facing windows.
Help vent air and also add light to high ceilings.
Catchment helps lower utility bills, enhances soil fertility, reduces demand for groundwater, boosts wildlife habitat, and gives us skills of self-reliance.
Gray water systems are legal in New Mexico.