canton near 5 years a great deal of changes. the rapid economic development. from the original small cities for a nationwide change in the top three cities. many foreign workers went to canton. high-rise buildings can be seen everywhere. however, all this is also has disadvantages. canton river pollution. often blocked arteries, in order to bring to the people of canton a lot of trouble. i hope canton in the future 5 years, sustained economic development, environmental pollution, so that more beautiful canton! canton为广州的别称`