-   Another cause of environmental pollution is the lack of responsibility of businesses. The most profitable multi-profit, not least business scope cascade, return the environmental pollution score. In addition, policies that are not well organized in the state's management and protection environment have also been approached for the next environment. Vietnam lacks strict environmental protection policies and regulations and makes investments vulnerable to the "trap": becoming more polluting industries. For example, the steel rolling industry consumes a lot of resources, such as land, water and energy, which pose environmental hazards. Out, amount of car to be shared in a few days at least you can not less into the preset gas beats.

-   Life in the city has long been a hankering for many people because of the benefits it brings. First, it provides us with many employment opportunities to increase income, feed ourselves and our families. There are a lot of kind of jobs from teachers, marketing, designers, ... which need a great human resource. Therefore, people feel easy to find a suitable job. In addition, the quality of life in cities is much better than in rural areas. The infrastructure is modern and there are full of services for the people. More and more entertainment centers, commercial centers, hospitals and schools are built. It means that people's health is better and their needs for entertainment are better. However, besides these positive aspects, the city still has some drawbacks. First of all, because of many factories, transportation and large population, the air here is very polluted, the road is full of smoke and dust, as a result it makes a bad effect on people's health. In addition, due to immigration, so many people rushed to the city so the cost of services and equipment is quite expensive. This is also the cause of a number of social evils such as theft, addiction, gambling, ... Today there are many large cities grow up, more and more people migrate in the city, but besides the positive aspects, the city still has limitations that no one wishes. Everyone should take consideration before deciding where to live.
-  I think teenagers are as stressed as adults because of many reasons related mainly to school, friends and family.
In fact, doing well at school involves a lot of pressure, because they have to complete school work, projects and reports and study hard for exams.
Then, there is also the stress of having a social life and being accepted by their peers in popular groups in addition to the physical stress which result from some emotional and physical changes which can leave adolescent confused and stressed.
finally, we can mention also the stress that comes from family problems and sibling rivalry.
To sum up, we can say that a lot of reasons can led teenagers to stress, which can provoke violent reactions, depression and health problems.

-  The life in the past is different from the life now. In the past, there was no advancedtechnology. All work must be done by hand and without modern equipment. Childrendidn’t have many opportunities to go to school. They used to stay at home and do choresto help their parents. The means of transport were bicycles and motorbikes. Althoughthere were a lot of disadvantages, the air was extremely fresh. The reason is that therewas no big factories and there was as many as now. Moreover, people were more friendlywhile now people don’t have time to communicate with each other because of beingbusy.