Consider a city with about 1 million habitants. The daily water consumption per capital is about 180 L, the average temperature is 28°C, and the weather humidity is <35% in most days. The capital daily income is about $60. There are limited surface water resources near this city. There is a big aquifer below the city, but its mineral concentration is high, and in some places, it is contaminated by septic tanks. Discuss water demand strategies that could be effective in this city.