New Delhi, Nov 13: Delhi recorded the country's worst air quality on Wednesday as it turned 'severe' for the first time this season, with the AQI soaring to 418.

Bihar's Hajipur, with an Air Quality Index (AQI) of 417, had the the second-worst reading in the country, Central Pollution Control Board (CPCB) data showed.

Of Delhi's 36 monitoring stations, 30 reported air quality in the 'severe' category, the CPCB said.

In comparison, the national capital's 24-hour average AQI -- recorded at 4 pm every day -- stood at 334 on Tuesday.

An AQI between zero and 50 is considered 'good', 51 and 100 'satisfactory', 101 and 200 'moderate', 201 and 300 'poor', 301 and 400 'very poor', 401 and 450 'severe' and above 450 'severe plus'.

According to the CPCB data, the city's AQI was in the 'severe' category for three days in January.

On January 14, the AQI was recorded at 447, followed by 409 each on January 24 and 26.

The CPCB said 'severe' AQI affected healthy people and seriously impacted those with existing medical conditions.

The air quality in the national capital had been in the 'very poor' category since it plunged to the level on October 30.

According to the Centre's Decision Support System for Air Quality Management, vehicular emission was the top contributor to Delhi's pollution, with an estimated share of approximately 13.3 per cent.

The other prominent pollutants were PM2.5 and PM10.

PM2.5 and PM10 refer to fine particulate matter in the air, with the numbers indicating their size in micrometres.

PM2.5 are fine particles with a diameter of 2.5 micrometres or less, about the width of a human hair. These are so small that these can penetrate deep into the lungs and even enter the bloodstream, posing significant health risks.

PM10 are coarser particles with a diameter of 10 micrometres or less, about the width of 10 human hairs. While not as concerning as PM2.5, these can still irritate the airways and worsen respiratory problems.

Long-term exposure to these particulate matter can increase the risk of heart disease.

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Jaipur/New Delhi (PTI): Defence Minister Rajnath Singh on Friday directed the top military commanders of the three services to integrate an "element of surprise" into modern warfare to outmaneuver India's adversaries and bolster strategic posture.

In his address at the joint commanders conference in Jaipur, Singh also described the Operation Sindoor as a testament to the "swift, precise, and joint response" of the Indian armed forces to safeguard national interests and called upon the military to remain ready to deal with any security challenges.

In their two-day deliberations, the commanders carried out a comprehensive review of the combat preparedness of the military in the wake of the evolving regional security situation.

Operation Sindoor was a demonstration of India's growing capabilities and a symbol of the nation's collective resolve and new military ethos, Singh said, a day after the first anniversary of Operation Sindoor.

He also unveiled a 'Joint Doctrine for Integrated Communication Architecture' that is aimed at strengthening doctrinal clarity, interoperability and integrated communications across the armed forces in future multidomain operations.

The joint commanders' conference, themed 'Military Capability in New Domains', brought together the top leadership of the defence ministry and the three services to deliberate on emerging security challenges and future readiness.

Comprehensive deliberations were held on future warfare, multidomain operations, technological transformation and joint capability development.

The conference witnessed extensive discussions on cognitive warfare, cyber resilience against evolving quantum and AI-enabled threats, military capability development in emerging domains, indigenous innovation and AI-enabled warfighting concepts.

It was attended by Chief of Defence Staff Gen Anil Chauhan, Chief of the Naval Staff Admiral Dinesh Kumar Tripathi, Chief of the Army Staff Gen Upendra Dwivedi, Chief of the Air Staff Air Chief Marshal AP Singh and Defence Secretary Rajesh Kumar Singh among others.

In his remarks, Singh asked the commanders to remain "future-ready" by learning from the operation as well as the current global security landscape.

He underscored the need to strengthen capabilities in artificial intelligence, autonomous systems, data analytics and secure communication networks to stay prepared in the rapidly evolving geopolitical security scenario. He emphasised that future conflicts will increasingly be shaped by hybrid threats, information dominance and operations conducted simultaneously across cyber, space, electromagnetic and cognitive domains, according to an official readout.

Highlighting the transformative impact of emerging technologies, Singh stressed on the importance of ensuring integrated national preparedness across all spectrums of conflict, it said.

Singh's remarks at the conference came a day after the first anniversary of Operation Sindoor.

The defence minister appreciated the progress achieved in enhancing jointness, integration and technological adoption across the three services, the readout noted.

Singh said that jointness constitutes a pivotal dimension within the transformative changes sweeping across the global defence sector.

"Future wars will not be won solely through weaponry, but through innovative thinking and enhanced synergy," he said.

The defence minister exhorted the commanders to cultivate the "element of surprise" to remain unpredictable to the nation's adversaries and secure a strategic edge in any given situation.

He, however, urged them to remain vigilant of the element of surprise of the enemy and always stay two steps ahead.

Singh also reiterated the Narendra Modi government's commitment to enhancing the capabilities of the defence forces through state-of-the-art weapons and platforms. He added that special focus is being laid on research in niche domains.

During the conference, he released a documentary film on Operation Sindoor.

The film reaffirms the nation's and defence forces' commitment to operational preparedness and decisive national response capabilities.

Demonstrations of advanced systems and platforms developed for intelligence fusion, operational planning and information management were also showcased during the conference reflecting growing integration of cutting-edge technologies into joint operational structures, according to the defence ministry.

The discussions will contribute significantly towards shaping India's future military transformation and integrated operational preparedness, it said.