Dust limits the amount of solarradiation that reaches the Earth, for example, a factor that could mask the warming effects of increasing atmospheric carbon dioxide.
灰尘限制了到达地表的太阳辐射数量，举例来说，会减缓因二氧化碳浓度增高而缠身滚的大气温室效应。
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This indicates that, besides solar angle, time and intensity of radiation, the height of trees is also an important factor that influences thermal effects of vertical thermal active surface of edges.
The temperature effect on large tonnage fly over beam caused by solarradiation should not be ignored, which will become the controlling factor of the structural design.