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WEDNESDAY, OCTOBER 12, 1994
THE
AIR POLLUTANTS INCLUDE REPORTED
SULPHUR DIOXIDE (SO2), (TSP) WHICH NITROGEN DIOXIDE (NO2), TOTAL SUSPENDED PARTICULATES COMPRISE ALL SIZES OF DUST PARTICLES, AND THE RESPIRABLE FRACTION THE DUST (RSP).
OF
ALL THESE POLLUTANTS SUFFICIENT CONCENTRATION.
AFFECT CAN
RESPIRATORY
HEALTH
IN
THE
NO
RECORDED IN SEPTEMBER, THE STREET LEVEL SITE IN MONG KOK
HOWEVER, HIGHEST POLLUTANT LEVELS OF THE THREE SITES, AS USUAL. EXCEEDANCES OF THE 24-HOUR AIR QUALITY OBJECTIVES WERE RECORDED AT ANY OF THE STATIONS DURING THE MONTH.
HIGH
TENDED TO COINCIDE
WITH
LOW
CONCENTRATIONS POLLUTANT WINDSPEEDS. FOR EXAMPLE, ON SEPTEMBER 17, THE LOW WINDSPEEDS PREVENTED
EMITTED
FROM DISPERSING LOCALLY
POLLUTANTS HIGHER AIR POLLUTANT CONCENTRATIONS.
QUICKLY,
TROPICAL CYCLONE
RESULTING IN
ON
NEAR HONG KONG OF A OCCURRENCE THE
POLLUTANT CONCENTRATIONS SEPTEMBER 1 AND 2 ALSO RESULTED IN HIGHER BECAUSE DESCENDING AIR KEPT A 'LID' ON THE ATMOSPHERE OVER HONG KONG.
AT
AS IN MOST MONTHS, THERE WERE LOW LEVELS OF SULPHUR DIOXIDE
AIR QUALITY ALL SITES, USUALLY LESS THAN 20 PER CENT OF THE 24-HOUR
AIR POLLUTION CONTROL (FUEL THAT THE THIS INDICATES OBJECTIVE. RESTRICTION) REGULATIONS, WHICH LIMIT THE AMOUNT OF SULPHUR IN HAVE ACHIEVED THEIR OBJECTIVES.
FROM ORIGINATED
FUELS,
VARIOUS THE GASES AND PARTICLES DESCRIBED
ARE SOURCES. SO2 IS MOSTLY PRODUCED WHEN FUELS THAT CONTAIN SULPHUR
BY THE COMBINATION OF BURNED. NO2 IS FORMED DURING COMBUSTION
FORMED IN THE NITROGEN AND OXYGEN. HOWEVER THE MAJORITY OF IT IS
PRODUCT OF ATMOSPHERE BY THE OXIDATION OF NITRIC OXIDE (NO), ALSO A COMBUSTION.
TERMS VEHICLE EXHAUST IS AN IMPORTANT SOURCE OF NO AND NO2 IN
IT IS ALSO A MAJOR SOURCE OF AIRBORNE OF IMPACT ON LOCAL AIR QUALITY. PARTICULATE MATTER, ESPECIALLY THE SMALLER RESPIRABLE PARTICLES.
PUBLIC LIGHT BUSES,
SUCH AS TAXIS, VEHICLES DIESEL-ENGINED PASSENGER COACHES, FRANCHISED BUSES AND LIGHT AND HEAVY GOODS VEHICLES
OTHER SOURCES ARE THE GREATEST CONTRIBUTOR.
OF PARTICLES INCLUDE FURNACES AND BOILERS, CONSTRUCTION ACTIVITIES, THE SEA
AND
INDUSTRY,
THE SOIL.
CLIMATE ALWAYS IT IS WORTH NOTING THAT WHILE THE WEATHER AND
WAY AFFECT THE CONCENTRATIONS OF POLLUTANTS IN THE AIR, THE ONLY SURE
EMISSIONS FROM THE MAN-MADE OF REDUCING THE LEVELS IS TO REDUCE SOURCES.
NOTE TO EDITORS:
FOR FURTHER INFORMATION ON THIS AIR QUALITY CONTACT MR RAYMOND LEUNG ON TEL 594 6401.
REPORT, PLEASE
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