Meng Zhang
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'Meng Zhang' - 1 News Result(s)
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Beijing Authorities Use Technology In Pollution Battle
Some Beijing residents use smokestacks to predict smog: Smoke drifting gently upward means stagnant air where smog will accumulate. Smoke blowing away from the mountains indicates fresher winds and clear air ahead.
'Meng Zhang' - 1 News Result(s)
-
Beijing Authorities Use Technology In Pollution Battle
Some Beijing residents use smokestacks to predict smog: Smoke drifting gently upward means stagnant air where smog will accumulate. Smoke blowing away from the mountains indicates fresher winds and clear air ahead.
