University English: the blog for ESL students

May 20, 2010

Yellow Sand

Filed under: student presentations — richardlstansfield @ 9:25 am

Glossary : yellow dust – yellow dust is in Asia upcountry small sand of desert or dust parches wind

Asian dust (also called “yellow dust”, “yellow sand”, “yellow wind” or “China dust storms”): (noun) clouds of soil and pollutants which affect much of East Asia during springtime

respiratory – respiratory mean relating to the process of breathing. (adjective)
inorganic – inorganic substances are substances such as stone and metal that do not come from living things. (adjective)

Yellow sand is a phenomenon that was caused by drying of North area of China after mountain range and Tibet highland appeared. Scientists discovered that Yellow sand has caused since 23million years ago by researching sand and mud.
Yellow sand is the phenomenon that sand and dust come from China’s Gobi desert, and it influence the south korea.

When Yellow sand blows, areas affected by the dust experience decreased visibility and the dust is known to cause a variety of health problems, not limited to sore throat and asthma in otherwise healthy people. Often, people are advised to avoid or minimize outdoor activities, depending on severity of storms. For those already with asthma or respiratory infections, it can be fatal. The dust has been shown to increase the daily mortality rate in one affected region by 1.7%.
Although sand itself is not necessarily harmful to soil, due to sulphur emissions and the resulting acid rain, the storms also destroy farmland by degrading the soil, and deposits of ash and soot and heavy metals as well as potentially dangerous biomatter blanket the ground with contaminants including croplands, aquifers, etc. The dust storms also affect wildlife particularly hard, destroying crops, habitat, and toxic metals interfering with reproduction. Coral are hit particularly hard. Toxic metals propagate up the food chain, i.e. from fish to higher mammals. Air visibility is reduced, including canceled flights, ground travel, outdoor activities, and can be correlated to significant loss of economic activity. Japan has reported washed clothes stained yellow.

But it is not that yellow sand only gives bad influence. acidified soil is neutralized by basic components that is are included in yellow sand. And magnesium which is included in yellow sand can be nutrition nutritious to fish.

The problem is that the yellow sand is getting stronger. The extent of Gobi desert which is the cause of the yellow sand is becoming wider. The extent of the desert is becoming wider 200,000ha every year because of global warming and cutting. Besides, as Chinese population increasing, exhaustion of underground water is also appeared to the problem. The U.S.A announced that thousands of lake have disappeared for 30years.

Discussion Questions
where does yellow dust come from?
what are bad points the negative effects of yellow dust ?
what are good points the good effects of yellow dust ?

Class 34

Group # 7


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