Sandstorms have been a major disaster for many Asian countries . Scientists have tried many ways to solve this problem. And the chinese government Is giving more attention to the problem. 这张照片是3月17日由NASA的OrbView-2卫星拍摄的真彩色照片 。在照片上，沙尘已经越过黄海，到达了日本以东的太平洋上空。 事实上，这次10年以来中国北方最大的沙尘暴不仅仅影响了日本， 据美国国家海洋和大气局（NOAA）报告，这次的沙尘暴已经跨越 太平洋，于27日到达了美国西海岸！ Fast reading : Look at the photos . Read the text quickly and answer the questions . 1. What is happening ? 2. What is the cyclists wearing and why ? 3. What do you think happen to traffic in this situation ? Why ? 4. What do you think experts advise people to do in this situation ?