GUWAHATI, July 22

Mumbai: After last week

The rains over the past few days might have brought the city to a halt, but they have given Delhi a much-needed break from air pollution.

There are several methods to communicate the use of different environmental quality parameters. This research communication discusses the use of Air Quality Index (AQI) describing air pollution in Choudwar area. AQI is computed for ten air quality sampling stations in the Choudwar area within the radius 10 kms from the core zone.

Fireworks display during festive celebrations can cause acute short term air pollution. Deepawali –the festival of light– is celebrated in India, every year during October or November with great fireworks display.

B. Aravind Kumar

Air quality in major cities, especially Chennai, is slowly deteriorating with the city topping the State with high levels of particulate matter, both Respirable Suspended Particulate Matter (RSPM) and Total Suspended Particulate Matter (TSPM).

One hundred and forty days before Delhi hosts the Commonwealth Games, Chief Minister Sheila Dikshit, on May 15, called a meeting to discuss ways to control air pollution in the city.

First the bad news: More than half of 130 Indian cities being monitored for air pollution are at critically polluted levels.

Now the good news: Air pollution in Indian cities has been proved to be reversible, with improvements in public transport or changing over to greener fuels, reducing pollution levels.

Although commuters are exposed to high air pollution concentrations, little quantitative information currently exists on differences in exposure from different modes of transport, routes, and fuel types. Zuurbier et al. (p.

Mumbai Six months after the Maharashtra Pollution Control Board (MPCB) found that the ongoing renovation of the Wankhede Stadium taking pollutants in the air and groundwater higher than the permissible limits in the locality, a second inspection shows that most of the polluting parameters are effectively under control. This was revealed after the second round of tests in April.

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