单选题 Please grade the following essay according to what you have learned in the above lecture.(2)In recent years, more and more peoples choice live in the big city, so that they should face to many challenges. Such as environmental phenomena, translation, lack of water… I list some of problems and give to some suggestions.Firstly, based on the people increasing, the environmental phenomena are becoming more and more phroment, bottles were pushed on everywhere. It is necessary for we must take care of our environment. We must education people. Secondly, with the building are being built, we have to use area instead of plant trees or bother green plants. We found the water are decrease, we start to lack of water, we need to save water in order to our life. I think plant green is very important. Finally, more and more taxi, bus on the street, the air pollution are becoming more and more serious. We need to do something to solve it.I hope live in big city will better and better in futhure