+ Dust pollution: Hanoi around 1, 2 mg/m3, 3-4 times the standard; Sea room about 1, 8 mg/m3; Ho Chi Minh City khoảng1, 6mg/m3. + Noise: in Hanoi, the measure's main roads on a number of shows that the average traffic noise level in all day about 75-80 dB; Haiphong is about 73-74 dB
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