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Nowadays, the escalating amount of time children are spending on computers has raised some questions about how the use of computer technology will affect their lives---from helping with their studies to causing mild forms of depression to encouraging sadistic behaviors. In here, we will mainly try to discuss an overview of the negative and sometimes positive effects of using computers at home for children’s physical, cognitive, and social development. Recently, some new stories reported on television, in the newspapers, and on the Internet suggest the increasing time of using computer for children is at the expensive of the time of their other activities; therefore, the case also increases their chances of becoming obese. However, educational research claims that playing computer games can be beneficial to build up computer literacy because it improves children's ability to read and visualize images in the three-dimensional space and to track multiple images simultaneously. The further studies indicate using computers at home is linked to somewhat better academic performance. Many parents also agree that this is advantage if the computers can be used at home in the highly competitive world. Although there is little evidence to indicate that moderate computer use can have a negative effect on children's friendships and family relationships, recent survey data show that increased use of the Internet may be linked to increase in their loneliness and despair. Some concern also discovers that playing sadistic computer games may increase their aggressiveness and desensitize a child to suffering. At the same time, the use of computers may distort a child's ability to distinguish real life from simulation. I believe, therefore, the current trend in increased computer use throughout the world that more systematic research is needed in these areas to help parents and policymakers maximize the positive effects and minimize the negative effects of home computers in children's lives.
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As we know, fresh water is crucial to our daily life. However, with the rapid growth of population and the industrial vast development, we confront with one of the most disturbing issues concerning our environment is the shortage of fresh water. "To be, or not to be: that is a question." To take actions to tackle the water pollution, or not to do anything, and just let it go. One thing is certain: if we do nothing, we will be faced with a sea of troubles. Water shortage is related to human being's life style. On the one hand, water pollution is known as the major factor that causes he shortage. Most of drinking water is used in industrial production. Simultaneously, the factory discharge various chemicals and waste water into the rivers, such as the Yellow River, and the Huai River. Some survey data indicates that the quality of water is worse in recent years in these rivers, compared with that of twenty years ago. The sewage which is caused by these factories not just pollutes surface water but also contaminates underground water. Household chemical products, pesticides, and chemical fertilizers are widely used in our life and production, which lead t pollution of fresh water resources to some degree. One the other hand, some people seem to lack the awareness of saving water that is one of the reasons in the shortage of drinkable water. Most of men have not a good habit of water-wise life style in their life and work. They deem frankly that they have paid for using water, so they should not be limited for using water. Absolutely, our public should be educated to save water. It is a fact that water shortage and the poor quality of drinking water have become one of the serious problems for human health problems. Therefore, the governments and individuals should take some feasible measures to ease the scarcity of water. Firstly, the government should carry out some policies, regulations, and laws to restrict discharging capacity of these factories, at the same time, urge the factories to improve their sewage system. Secondly, we should spare no effect to reduce to use house chemical products, pesticides, and chemical fertilizers in our life and agricultural production. Finally, in whole society, the public should also be advocated to live a water-conscious life style and to treasure other natural resources. |