What are the threats to the Yellow River? What is the reason for the threat? Set up a slogan to protect the Yellow River. (What is the meaning of writing this slogan?)

Threats to the Yellow River: soil erosion, Yellow River drying up, Yellow River pollution

Causes: First, the temperature on the Loess Plateau turned cold and a large amount of sediment flowed into the Yellow River; second, the population grew rapidly and the river was inundated with water. Indiscriminate deforestation leads to soil erosion

Slogan: Green mountains and green waters come to accompany you, and the mother of the Yellow River smiles.

Reason: Call on everyone to protect the Yellow River and protect the ecological environment