本听写稿由一抹茶香听写,来自沪江VOA听写系统The fans directed airflow from the poultry houses tour toward the homes of neighboursneighbors. A team let led by George Malone at the University of D, begun daling Delaware began dealing with the problem in the year 2000. The team reacently recently presented a report at the national meeting of the American Canmical Sericerty Chemical Society in Washanten Washington, D. C. Over a period of 6 years, the scientists found that planting 3 rows of trees reduced total dust and ammonia by more than half, and . And they say the trees reduced odors by 18 precent18%.
For the first row nearest the fans, they jenerouly generally suggest using trees that lose their leaves in the fall , or trees with wix waxy leaf surfaces. They suggest ever green evergreen trees for the other two 2 rows, some . Some trees work better than othersand . And what works in one area of the country may not work is as well in other places.
Farmers may think trees will take too long to grow to be affectiveeffective. But some trees can grow as faster fast as 3 milters meters a year.
Todayone third , 1/3 of the Delmarva farms have planted trees, techonicly kown technically known as in very mental boffersvegetative environmental buffers. These boffers buffers can offer a way to cut pollution, save money and make the neighbours neighbors happy.
听写于:2008-9-19 12:53
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posted on 2008-09-19 12:55
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