In 2540 (1997) Pollution control Department conducted measurement. Carbon monoxide in Bangkok found that odd values lower than the standard 1-hour average (30 million in section section) and maximum 1-hour average almost every station is lower than the benchmark as well. There are only some of the Meteorological Department stations, who found that higher than the standard value (in section 36.6 million) (22) Considering the trend of such gas. The General area of Bangkok, also found that alarming (graph 2.10).
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