This document summarizes collaborations between the Department of Defense (DoD) and the Environmental Protection Agency (EPA) to develop sustainable and resource efficient solutions. It outlines the Army's Net Zero Initiative which aims to produce as much energy, limit freshwater use, and reduce waste as possible on military installations. The EPA and Army are partnering on projects to test decentralized water reuse technologies, explore demand-side water conservation through education, and evaluate vehicle decontamination methods. The partnerships aim to demonstrate new solutions while reducing environmental footprints and informing broader adoption.