What strategy reduces outdoor water use while also improving the triple bottom line?

The strategy that reduces outdoor water use while also improving the triple bottom line is installing a landscape that doesn't require a permanent irrigation system. This approach focuses on selecting native or drought-tolerant plants that are well-suited to the local climate and conditions.

By using such plant species, the need for extensive irrigation is significantly diminished, leading to lower water consumption and reduced costs associated with water use and maintenance. This not only conserves water resources but also minimizes the ecological impact and operational costs over time, aligning with the principles of sustainability within the triple bottom line framework—environmental, social, and economic performance.

Additionally, landscapes that require less irrigation contribute positively to the community's aesthetic and ecological health by promoting biodiversity and reducing runoff. This holistic approach creates long-term value for both the environment and the stakeholders involved, thereby enhancing the overall sustainability of the project.

The other strategies, while beneficial in certain aspects, may not equally achieve the same degree of overall improvement in the triple bottom line. For instance, high-efficiency irrigation systems do improve water use efficiency but still rely on ongoing water input. Rainwater harvesting is an excellent method for reducing reliance on municipal water sources but may involve complex setup and maintenance. Creating artificial lakes for irrigation can have significant environmental