Now is the year 2030 and let me introduce myself, I am a wealthy businessman in the tour around the world. All of the places I have gone through are large cities with magnificent buildings. Many big and small companies, factories, food stores, clothing stores grow up rapidly like mushrooms. Life here is happy, warm, no longer famine, poverty, all children go to school. Surprisingly, traffic congestion has been thoroughly improved. People now limit the use of own personal vehicles, most of whom travel by public transport such as buses and subways to save fuel and protect the environment. The government is also very concerned about the environment, starts campaigns such as reforestation, development of ecological zones, conservation areas, etc to regain ecological balance, reduce the effect of the greenhouse. How wonderful is it! Here is a life that we have been long looking forward!