Abstract:
The level of smoke concentration lead and tarry deposit on tree leaves has been determined during the survey carried out in 1975, 1982 and 1983 along the main roads of Karachi. The highest smoke concentration is found at the Tibet Centre, where it was 270 µg/m in 1975, 598 µg/m in 1982 and 623 µg/m in 1983. The maximum amount of tarry deposits on leaves is 4.987 g/sq. ft. containing 0.019% lead, found in the Burns Road Area near the KMC School. The results have been compared with the previous surveys in this context and it has been noted that at all the sampling points, the smoke level during the last 14 years has alarmingly increased by about 5 times.
Page(s):
60-70
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 30, Issue: 1, Year: 1987