1. What is said to be the cause of sandstorms occurring in northern China?

2. What other countries are affected by the Chinese sandstorms?

3. How are people affected by the sandstorms?

4. What warning did China's Central Meteorological Station post on its website this week?

5. What warning did the U.S. Embassy in Beijing issue regarding the sandstorms?

6. How has the Chinese government attempted to counter the effects of desertification that in turn partially causes the sandstorms?