people are inventing things more friendly to enviroment. on the other hand, other people come to corrupt what the other people had come to fix. it is too funny, so when will all work for the same goal and strive for best. anyway, we live in a dull world full of contradictions. This case is not only mine, it relates to all people, we should strictly go under what it is the best for good enviroment. One hand can’t clap by its own. As good enviroment is the right for all.