fresh water In some parts of the world, people lack fresh water due to the severe hot and dry weather. However, demand for fresh water has been increasing and it is a heatedly debated problem now. The more serious water pollution triggers the market for clean water. Governments and individuals should unite together to solve the problem. Some people allege that a variety of drinking water appear in the supermarkets and the portable water resource is abundant. But they ignore the reason hidden behind the fact that the latest brands of water are priced much higher than the original ones, like NongFu Spring and Wahaha. That is because the water comes from isolated glaciers and icing mountains and intense labor and accurate equipment are used to pump out the portable water. People pay more attention to the unpolluted areas due to the increased pollution of former clean lakes and rivers. As is shown in the news, the drinking water resources are plummeting every year and authorities have to find a new region to exploit water. It is high time that the society responded to the problem related to inhabitants worldwide. Governments should solve the problem from its root. For instance, protection of many natural areas ought to be strengthened and recycled machine should be set up on the streets and in the neighborhoods. At the same time, individuals can cultivate the habits of picking up rubbish and using canvas bags rather than plastic counterparts. A stronger sense of protecting the environment, a better earth you live on.

illustrate a diagram The two diagrams illustrate the process of making cement and then the concrete production. Overall, the limestone and clay pass through four pieces of equipment before being bagged ultimately in the form of cement, which is applied with additional materials in the production of concrete.In the first production, limestone and clay are employed together through the crusher at the beginning point. Then the powder is transmitted through tubes from the mixer to a rotating heater, which heats the mixture by using fire constantly. The grinder plays an important role of making the powder into cement. Finally, the cement is packaged into the bags of standardized size. Regarding the second diagram, cement is then involved into the production of concrete, which helps constructing buildings. To produce concrete, three ingredients are also necessary besides cement and the proportion of each element is quite accurate. 10 percent of water and 50 percent of gravel consist of the three-fifth of the concrete mixture. 15 percent of cement and one-fourth sand are as well added into the giant container. At this time, concrete is taken into shape after several stages and various equipment. By comparison, the stages of producing cement is more tedious and time-consuming while concrete is formed in a mixture.

in many parts of world, children have more freedom than they used to have.positive or negative? Nowadays, the world is much safer than that in the war times and the technology has been improved and upgraded to monitor children from a distance. Parents trust their kids with more independence and give them more freedom to various alternatives. I am of the opinion that it affects children more in a positive way than a negative one. Those who are against my opinion think that there still exists different crimes and children are vulnerable to those attack, deception and robbery. However, children will not always in the sight of parents. They should and have to learn how to protect themselves when alone. Some parents and tutors also allege that more freedom means less upbringing. The reason seems to be tempting to believe that those who commit crimes share the common characteristic of no parental control or education in the childhood, but it is the misinterpretation of more freedom given to adolescents. Parents may give kids more rights to choose their extracurricular lessons to cultivate their own hobbies and develop their ability to complete a mission independently. Appropriate tuition is a must and it enables children to have more freedom in the limited bound line of law and ethic. To zoom into the cases of injury and killing of adolescents, it can be concluded that those kids fall on hard times mainly because of lack of the conscience of self-protection. One in four missing children was well protected by his family before, which supports that too much protection is inappropriate. Although children may face difficulties and danger when exposed to more freedom, they grow fast and they can figure it out to avoid happening anymore. In conclusion, children should have more freedom to decide their own life path and they will benefit more than in the shelter.