Question 2: A few days ago, North China was eroded by sandstorms, and the causes and effects of sandstorms were discussed.

1. Reason: In spring, the temperature rises rapidly, the evaporation is vigorous, the climate is dry, it is windy and dusty due to the influence of the fast moving cold front.

2. Impact: Sandstorm will adversely affect the growth and yield of crops, resulting in the loss of agricultural production; It will also destroy the local ecological environment, leading to vegetation loss, land desertification, soil erosion and other problems.