2. Made by Forrest Yue SJTU Environmental Science and Engineering School1 Environment Protection in My Hometown ━ Lanzhou Lanzhou,located between two large mountain ranges, is my beloved hometown. This photo shows you a overall sight of the district I once lived in.

3. Made by Forrest Yue SJTU Environmental Science and Engineering School2 A Brief Introduction of My City Lanzhou, covers 13,100 km 2, has a population of 2.89 million, once a significant city on the Silk Road, now a transportation center in Northwest, and also has a well-developed oil Refinery industry.

4. Made by Forrest Yue SJTU Environmental Science and Engineering School3 Problems of the Yellow River S tatue S tatue of the Mother River River, represent that our civilization is originated from the Yellow River On the right is Yellow River, it passes across my city. As to Yellow River, it contains extraordinarily large amount of sand which outweighs that of any other rivers in the world. That’s half water, half sand.

5. Made by Forrest Yue SJTU Environmental Science and Engineering School4 This is a typical topography of Yellow Plateau Rain water rushes sand,clay, which can’t be hold by land itself without plants’ ability of absorbing water, into rivers. That’s why it became yellow. Cause of Such A Color

6. Made by Forrest Yue SJTU Environmental Science and Engineering School5 Our Painstaking Effort Before the liberation of our country, there were no trees on the two mountain ranges,however, after decades of hard work, now the two sides are covered with green. The river bank was once the most dirty and smelly part, but now, it has turned out to be a resort area.

7. Made by Forrest Yue SJTU Environmental Science and Engineering School6 Problems of atmosphere Before 1998, duststorms only happened in some regular years, but now, it occurs frequently, especially in spring and winter, and the span has been increasing, our people have suffered a lot from the disaster directly.

8. Made by Forrest Yue SJTU Environmental Science and Engineering School7 Government’s Continuous Efforts Government’s Continuous Efforts In the past, every family had a stove to warm the house in winter, that had released a large amount of smoke and poisonous gas into atmosphere. Now, with the development of Central Heating System, family stoves have disappeared. These two photos show the largest electricity plant whose hot water can be reused as the main resource by the Heating System.

9. Made by Forrest Yue SJTU Environmental Science and Engineering School8 At the background of economic development, city government also put a great deal of attention on rising the living standards of citizens The grassland was once a pile of worn- down houses Making A Balance between Economic Development and Environment Protection The lake was once a sewage pool of the Lanzhou Oil Refinery, but after great devotion, now it becomes a beautiful park.

10. Editor: forrest Yue Technical assistant : Lee