What has the greatest potential for reducing the demand for water?

The choice emphasizing better use of technology in agricultural irrigation is particularly significant because agriculture accounts for a large portion of freshwater use globally, often exceeding 70% in many regions. By improving irrigation techniques, such as adopting drip irrigation systems or precision watering, it becomes possible to significantly reduce water waste and enhance water efficiency. This approach allows for more targeted application of water, improving crop yields with less water usage, which can help alleviate the pressure on freshwater resources.

In contrast, while conservation practices in homes, recycling plants in industry, and home sewage disposal units do contribute to overall water management, their potential for water demand reduction is generally less impactful than advancing agricultural technology. Home conservation practices can reduce usage, but the scale is limited compared to large-scale agricultural water use. Industrial recycling plants are important for managing industrial water use, but they may not address the primary agricultural water consumption issues. Home sewage disposal units, while necessary for sanitation, do not directly contribute to reducing water demand in significant ways.

Thus, enhanced agricultural irrigation technology stands out as the most effective method for achieving a substantial reduction in overall water demand.