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Tue Dec 24, 2019 3:36 am
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Sandstorms are a distant word for our children in the coastal areas. However, it really happened to us. So what is a sandstorm? Sand storm is a general term for both sand storm and dust storm. It refers to a severe wind and sand weather phenomenon where strong wind blows a large amount of sand and dust on the ground into the air, making the air particularly turbid, and the horizontal visibility is less than 1 km. A sandstorm is a sandstorm caused by a strong wind that blows a large amount of sand particles into the surface. Dust storms are storms created by high winds that drag a large amount of dust and other fine particles into the sky Carton Of Cigarettes. Where does the dust come from? In the spring of previous years, a total of 53 sandstorms occurred in China (9 times in 1999, 14 times in 2000, 18 times in 2001, and 12 times in 2002), 33 of which originated in the Gobi region of central and southern Mongolia. In other words, about 60% of the sand and dust that ravages our country comes from abroad. Sandstorms can cause inconvenience and harm to our lives. For example: strong winds carrying fine sand dust destroy buildings and utilities, causing human and animal casualties; farmland, channels, cottages, railways, pastures, etc. are buried by a lot of quicksand, especially posing a serious threat to transportation; In the affected area, the respirable particulate matter in the atmosphere has increased, and atmospheric pollution has intensified; there is also ... However, the earth must not be free of sandstorms. Because the dust particles contain more alkaline ion components such as calcium ions and magnesium ions, acid rain (PH value 4.7) in northern China and South Korea and Japan can be neutralized into ordinary rain water (PH value 5.6), thereby slowing down. Acidification of soil. In addition, the iron and other nutrients carried by the sand and dust particles are conducive to the growth and development of marine life after being transported and settled into the ocean. Not only can sand and dust have an impact on the primary productivity of marine plankton Parliament Cigarettes, it can also have a significant impact on the ocean carbon cycle and the global climate system. Sandstorms are notorious, especially in the last few years of the 20th century, when their voices have grown stronger. In fact, in nature, dust storms are not only unpleasant "uninvited guests", they are also "old friends" who bring rich nutrients and "good helpers" to improve the quality of the environment Marlboro Cigarettes. The dust storm brought the tiny but nutrient-containing dust to a height of 3,000 meters, crossed the ocean, and sown the vast North Pacific, so that it now forms the Hawaiian Islands. However, now the environment on the planet is deteriorating, the climate is changing, the glaciers are melting, and the sea is rising ... These are not just issues that a few people should worry about. The home of the earth is closely related to each of us. In today's increasingly serious environmental problems, should we calm down and think about what else we can do to save the earth and ourselves? Indiscriminate, indiscriminate, indiscriminate grazing, indiscriminate. In the era of ignorance, the earth nurtures us . Later, we improved but hurt her. Now we are going to protect her and do everything in my power |
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