'South Indian cities reeling under severe air quality, need urgent intervention'

Bengaluru, Jan (IANS): In terms of air-quality and pollution levels, cities in south India are seen to fare better than their counterparts in north India, but things may not be so rosy anymore. Several cities in the states of Andhra Pradesh, Telangana, Tamil Nadu, Karnataka, and Puducherry, suffer from pollution levels that exceed the World Health Organisation (WHO) guidelines, a study by Greenpeace India reveals.

The latest report by Greenpeace India, analysing the Central Pollution Control Board (CPCB)'s data from ten major cities of southern India reveals that average pollution levels in the cities far exceed the latest WHO guidelines.

Central Pollution Control Board (CPCB)'s data on ten cities - Bengaluru, Hyderabad, Chennai, Amaravati, Visakhapatnam, Kochi, Mangalore, Puducherry, Coimbatore and Mysore - were selected and analysed based on the availability of data, population and monitoring station networks. It was found that despite pandemic-induced lockdowns and subsequent reduction in economic activities, the annual average values of PM2.5 and PM10 exceeded WHO's revised standards by many folds, a statement from Greenpeace India stated on Thursday.

Coimbatore, Bengaluru, Mangalore and Amaravati saw annual PM2.5 levels exceed WHO guidelines of 5 Aug/m3 by 6 to 7 times. While in Mysuru, Kochi, Chennai and Pondicherry, PM2.5 levels exceeded the guidelines by 4 to 5 times.

In comparison, while annual PM10 levels in Visakhapatnam and Hyderabad exceeded the prescribed WHO guidelines of 15 Aug/m3 by 6 to 7 times, Bengaluru, Mangalore, Amaravati, Chennai and Kochi recorded data that exceeded the limit by 3 to 4 times. Mysore, Coimbatore and Pondicherry recorded PM10 data that exceeded the WHO guidelines for safe air by 2 to 3 times.

The primary contributors to worsening air quality are fossil fuel powered infrastructural development, industries, transport, waste burning and construction activity. Chronic exposure to air pollution increases the likelihood of asthma, low birth weight, depression, schizophrenia, diabetes, stroke, lung cancer and can cause premature deaths.

Commenting on the analysis, Avinash Chanchal, Campaign Manager, Greenpeace India says: "The data shows that lockdown is not a solution to air pollution. Relatively lesser economic activity and vehicles is also putting us in a dangerous position. We have to prioritize the immediate shift to clean energy and clean transport to stop more damage."

Chanchal also highlighted: "Making our urban transport networks accessible and sustainable can play a major role in combating India's urban air pollution crisis. Majority of the population in these cities is already using public transport or sustainable ways of transportation. But the infrastructural focus is still on private vehicles. Efforts and lifestyle of the masses must be appreciated and encouraged as they are contributing to making our cities sustainable."

Terming the citizenry using public transport as 'Heroes', Chanchal adds, "The pollution control boards must realise that no level of air pollution is safe and even the long term exposure of lower level of concentrations of air pollution can severely impact human health. Thus, the CPCB must revise the current national ambient air quality standards for all pollutants based on WHO's proposed interim target and gradually achieve the revised standards."



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    Thu, Jan 27 2022

    This is due to a phenomenon called Global Dimming which is the reduction in the amount of global direct irradiance at the that has been observed since systematic measurements began in the 1950s. The effect varies by location, but worldwide it has been estimated to be of the order of a 4–20% reduction. However, after discounting an anomaly caused by the eruption of Mount Pinatubo in 1991, a very slight reversal in the overall trend has been observed. Global dimming is thought to have been caused by an increase in particulates or aerosols, such as sulfate aerosols in the atmosphere due to human action. It has interfered with the hydrological cycle by reducing evaporation and may have reduced rainfall in some areas. Global dimming has been attributed as the leading factor in the 1984 Ethiopian famine by reducing heating at the tropics which drives the annual monsoon, or wet season. Ways to Reduce Global Dimming is: 1. Switching to alternative sources of energy 2. Reducing levels of pollution (Limiting Diesel & Coal consumption for transportation & power generation) 3. Controlling wildfires (Which is not there in India) 4. Switching to nuclear energy.

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