There are many public service announcements about water conservation. Please imitate one of the slogans below and create one of your own.

Water is an important raw material for industrial and agricultural production, and is also a precious natural resource for human survival. Without water, there will be no life, and without a good natural environment, social and economic sustainability will not be achieved. develop. Today, the world has entered an era of water shortage and global water crisis. Compared with other countries, China's water resources and water environment conditions are more worrying: First, China's total water resources are seriously insufficient. In 1998, China's per capita water supply was 2,251 cubic meters, only 1/4 of the world average. It is predicted that with our population of 16 million, per capita water resources will drop to 1,760 cubic meters by 2030. Secondly, the spatial and temporal distribution of water resources in China is very uneven. The absolute amount of reduced water resources is greater in the east and the east is lacking. Fengjie's per capita consumption is divided into two reverse recursive degree distributions. China's water environment is deteriorating day by day and water resources are decreasing. China's future economic development, population growth and urbanization will further increase its demand for water resources. How to solve the contradiction between insufficient water supply and increasing demand has become a major issue that urgently needs to be studied and solved.

The core of sustainable utilization of water resources is to improve water utilization efficiency, put water conservation in a prominent position, promote water conservation measures, develop water-saving agriculture, industry and services, and build a water-saving society. In order to improve the efficiency of water use, in addition, it is necessary to innovate and reform the water resources management system through institutional innovation and establish a reasonable water price formation mechanism to mobilize the enthusiasm of the whole society to save water, prevent and control water pollution, and vigorously develop the promotion and application of water-saving technologies. A very important part.

(1) Promote agricultural water-saving technology. Agriculture accounts for 80% of China's total water consumption, and the most serious agricultural water waste is irrigation. Accounting for 70% of water consumption in agriculture, more than half leaks during irrigation, and 30 to 35% is wasted in irrigation. . It is necessary to vigorously develop water-saving irrigation technology and transform traditional extensive irrigation agriculture and dryland rain-fed agriculture into water-saving and efficient modern irrigation agriculture and dryland agriculture. Agricultural irrigation, water-saving irrigation technology, improving surface irrigation, and promoting surface irrigation water-saving technology suitable for China's national conditions (such as ground, furrow irrigation, intermittent irrigation, etc.). Implement North Canal irrigation and drainage irrigation, and develop a combination of sprinkler irrigation and drip irrigation in areas where conditions permit. If water conservancy and agricultural technology are compatible, a water-saving crop rotation system will promote agriculture and planting, fertilizing, and drought-resistant high-yielding high-quality varieties. Dry farming areas should focus on building basic farmland terraces based on the principles of flood, drought and complementarity, and make full use of rainwater harvesting dry farming, water-saving irrigation and modern agricultural technology, and adopt various measures to reduce ineffective evaporation, improve soil organic matter, and improve soil quality. Reservoir to improve water storage. At the same time, according to the water demand characteristics of different crops and local water quality conditions, the crop layout is adjusted, the planting structure is optimized, and excellent varieties are cultivated.

(b) Promote industrial water-saving technologies. Industrial production is a large user of water. China's industrial water consumption is 5 to 10 times that of developed countries. Compressing the output value of industrial water still has great potential to be tapped. We can reduce industrial water consumption from the following three aspects: (1) Reform the water consumption in the production process and use less water. Instead of the old-fashioned open-hearth furnace, the unit water consumption of the converter steelmaking production process is several times or even dozens of times higher than the advanced foreign level. It can not only increase steel production, but also reduce water consumption by 86 to 90%. (2) Improve the reuse rate of water resources. 90% water reuse rate, foreign advanced industrial enterprises, and water for the vast majority of Chinese enterprises use wastewater. Although some of our water-scarce big cities have higher industrial water reuse rates, this region is very different and has the potential to further tap and save a lot of water. (3) Explore the technology of utilizing seawater and brackish water. Due to the lack of fresh water resources, coastal cities use seawater as industrial circulating cooling water and toilet flushing water. North China and northwest regions can develop brackish water resources.

(c) Promote water-saving technology in urban life. Urban domestic water is an important aspect of water resources and another important source of water pollution.

According to the construction method of the Ministry of Urban Water Resources, 1/3 of China's urban water supply and water resources are running during operation, running, dripping, leaking, and losing center. Because the tap water pipes in many cities are old and of poor quality, water leakage from pipes in China reaches 60 billion cubic meters every year, accounting for more than 20% of the water supply in the tap water pipe network. Faced with this situation, energy-saving technological transformation of urban water supply pipe networks should be promoted, the development of water-saving appliances should be promoted, water conservation should be advocated and encouraged, and water-saving cities should be created.

(d) Cultivate, introduce and absorb advanced pollution control technologies. In addition to saving water, in the development of agriculture, industry and domestic water use, the country has introduced the most advanced pollution control technology and improved sewage treatment and reuse are important ways to save water. Facing the increasingly severe water environment, China's pollution problem has shifted its strategy from "end-of-pipe treatment" to "source control." Actively develop and introduce advanced foreign pollution control technologies to improve the depth of urban sewage treatment, and urban sewage has opened up a second water source. This circulating water can be used as municipal water, industrial cooling water, environmental water, ground water, flushing water and irrigation water. This is the fundamental way to protect water supply quality and improve the water environment, which is an inevitable requirement to achieve coordinated development of urban water resources and environment.