The wind is a conveyor belt over the earth, which blows the sand and dust of the continent to the ocean and the water vapor of the ocean to the continent. When the sand and water vapor meet, they can be combined into clouds and eventually become precipitation. It plays an important role in the distribution and supplement of water, and also plays an important role in the global water cycle. It can be said that sand and dust are also factors that determine the global ecological balance. What is wrong about the phrase "sand dust is also a factor determining the global ecological balance?". ['The weather phenomenon of sand and dust has existed since ancient times, and it plays a certain role in the ecological balance of the earth.', 'Sand and dust gradually accumulate to form sand storms, which plays a role in maintaining ecological balance globally.', 'Sand and dust contain alkalinity, which can balance the acidic substances in the atmosphere, thereby slowing the occurrence of acid rain.', 'Sand and dust not only play an important role in the distribution and replenishment of soil, but also in the global water cycle.']