请根据提示问题，写一段话介绍深圳的相关情况。要求语句通顺、书写规范。至少5句话。

Tips: （1）Is Shenzhen clean?
（2）Are there a lot of trees?
（3）Are there many cars and buses on the road?
（4）Do people use a lot of plastic bags?
（5）What should we do to keep the city clean?