Swiss air monitoring index ranks Pakistan’s Lahore as world’s most polluted city

School children walk across a railway track amid dense smog in Lahore, Pakistan, on October 29, 2025. (AFP)
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Updated 29 October 2025
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Swiss air monitoring index ranks Pakistan’s Lahore as world’s most polluted city

  • IQAir says Lahore recorded AQI of 331 in while Karachi, with AQI of 124, ranks at number 10
  • Lahore faces worsening smog in winters from crop burning, vehicle emissions, industrial pollution

ISLAMABAD: Swiss air monitor index IQAir ranked Pakistan’s eastern city of Lahore as the most polluted in the world on Wednesday, recording its Air Quality Index (AQI) at 331 as it continues to choke from toxic winter smog. 

Lahore faces worsening smog each winter from crop burning, vehicle emissions and industrial pollution that threaten public health and daily life. Smog can cause sore throats, eye irritation and respiratory illnesses, while long-term exposure increases the risk of stroke, heart disease and lung cancer. 

The global air monitoring index said Lahore’s AQI was recorded at 331, deeming it at the “hazardous” level while its Particulate Matter (PMI) was recorded at 2.5 around 7:00 p.m. local time on Wednesday.

“PM2.5 concentration is currently 48.1 times the World Health Organization (WHO) annual PM2.5 guideline value,” IQAir said. 

India’s capital New Delhi was ranked at number two with an AQI of 290, while the China’s Beijing recorded an AQI of 228, making it the third most polluted city worldwide. 

IQAir added Pakistan’s commercial hub Karachi, which ranked at number 10 on its list of world’s most polluted cities on Wednesday, recorded an AQI of 124. The air monitor recorded its AQI as “unhealthy for sensitive groups.”

“PM2.5 concentration is currently nine times the WHO annual PM2.5 guideline value,” IQAir said about Karachi. 

Smog season begins in late October, peaks from November to January and lasts through February.

Earlier in October, the government in Pakistan’s most populous Punjab province conducted its first anti-smog gun operation, which helped lower the city’s unhealthy air quality levels. Anti-smog trucks sprayed fine water mist across the city to help settle dust and pollutants.

Pakistan’s main urban centers routinely rank among the most polluted cities in the world, with vehicular emissions remaining one of the top contributors to air pollution.

This severe air pollution also undermines economic productivity and diminishes the quality of life for millions of residents.


Pakistan Supreme Court halts trial of prominent lawyer over alleged anti-military tweets

Updated 57 min 11 sec ago
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Pakistan Supreme Court halts trial of prominent lawyer over alleged anti-military tweets

  • Top court orders lower court to pause proceedings after lawyers allege due-process breaches
  • Mazari-Hazir, husband face charges under cybercrime law that carry up to 14 years in prison

ISLAMABAD: Pakistan’s Supreme Court on Thursday halted the cybercrime trial of prominent human rights lawyer Imaan Mazari-Hazir and her husband, Hadi Ali Chattha, after their lawyers argued that a lower court had recorded witness testimony in their absence, violating due-process rules.

Mazari-Hazir, one of Pakistan’s most outspoken civil liberties lawyers, and Chattha are being prosecuted under the Prevention of Electronic Crimes Act (PECA) over posts on X that authorities say incited ethnic divisions and portrayed the military as involved in “terrorism.” Both reject the allegations. If convicted under the relevant PECA provision, they face a prison term of up to 14 years.

The case has drawn broad attention in Pakistan’s legal community because Mazari-Hazir, who has been repeatedly detained over her criticism of the security establishment, argues that the trial court ignored basic procedural guarantees despite her medical leave request. The case also comes as Pakistan faces sustained scrutiny over the use of PECA against activists, journalists and political dissenters, with lawyers arguing that lower courts often move ahead without meeting minimum fair-trial standards.

The couple’s lawyer, Riasat Ali Azad, said his clients filed a petition in the Supreme Court because the lower court had moved ahead improperly.

“Today, the Supreme Court of Pakistan has stayed the lower court proceedings, the trial court proceedings and has said that the [Islamabad] High Court should decide our pending revision petition for which a date has already been fixed,” he told reporters.

Azad said the violation was clear under Pakistan’s Code of Criminal Procedure, which requires evidence to be recorded in the presence of the accused.

“Yet, on that very day, evidence of four witnesses was recorded in their absence, and a state counsel was appointed to conduct cross-examination on their behalf,” he said. “All these things are against the right to a fair trial under Articles 10 and 10-A.”

A three-judge bench led by Justice Muhammad Hashim Khan Kakar ordered the trial court to pause proceedings and instructed the Islamabad High Court to hear the couple’s pending criminal revision petition first.

The trial had been scheduled to resume on Dec.15, but the Supreme Court’s stay now freezes proceedings before both the additional sessions judge and the special PECA court. 

The Islamabad High Court is expected to hear the criminal revision petition next week.

Chattha, who is also a lawyer, said the SC ruling underscored the need for procedural safeguards.

“It is a victory for the constitution and the law,” he said, arguing that the trial court had ignored their request to re-record witness statements in their presence.