Yellow Sky

Through this weekend, we've had ugly yellow sky. In every spring, a huge amount of tiny sands fly from Chinese and mongolian deserts to Korea. We call the phenomenon yellow sand. When the yellow sand covers all over the sky, it is very hard to breathe and see. Furthermore, due to the industrialization of China, it contains a lot of hazardous materials. As the result, many people have diffilculty in breathing and suffer from throat pain. To reduce the amount of the sands, many countries are trying to make deserts green but it's not very effective. When the yellow sand fills up the sky thickly, schools close, a few people are on the streets, no pro games like baseball, etc. So, there is nobody likes the yellow sand but it also has positive role in the huge nature system. According to some reports, yellow sand prevents the green house effect and a red tide, neutralize soil, and so on. Anyhow, that's true it's very unpleasant and I want to see blue and beautiful sky again.