"Concentrations"

#12871970

17 Oct 2025

A portion of Kathmandu, Nepal, is covered by a thin layer of smog that shrouds the atmosphere of the bowl-shaped Kathmandu Valley on October 17, 2025, with the Air Quality Index measuring above 100. The average readings of Kathmandu's pollution exceed the annual average concentrations of PM2.5 of 5 ug/m3, while 24-hour average exposures should not exceed 15 ug/m3 more than 3-4 days per year, as prescribed by the World Health Organization. PM2.5 refers to particulate matter (solid or liquid droplets) in the air less than 2.5 micrometres in diameter. It is among the most dangerous pollutants that can get past the nose and throat to penetrate the lungs and even the bloodstream. PM2.5 particles are small and are also likely to stay suspended in the air for long, increasing the chances of people inhaling them. According to Nepal's Environmental Protection Agency's air quality index, an air quality reading of 151-200 is considered unhealthy, causing everyone to experience problems and sensitive groups to feel more severe effects. When air quality reaches 201-300, it is considered a very unhealthy level, and health risks increase for everyone in the area. When it crosses 300, it becomes hazardous, meaning that the air is of extremely poor quality and poses serious health risks to everyone.

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#12871973

17 Oct 2025

Smoke billows from a residential area in Kathmandu, Nepal, on October 17, 2025, as a thin layer of smog shrouds the atmosphere of the bowl-shaped valley, with the Air Quality Index measuring above 100. The average readings of Kathmandu's pollution exceed annual average concentrations of PM2.5 of 5 ug/m3, while 24-hour average exposures should not exceed 15 ug/m3 more than 3-4 days per year, as prescribed by the World Health Organization. PM2.5 refers to particulate matter (solid or liquid droplets) in the air less than 2.5 micrometres in diameter. It is among the most dangerous pollutants that can get past the nose and throat to penetrate the lungs and even the bloodstream. PM2.5 particles are small and are also likely to stay suspended in the air for long, increasing the chances of people inhaling them. According to Nepal's Environmental Protection Agency's air quality index, an air quality reading of 151-200 is considered unhealthy, causing everyone to experience problems and sensitive groups to feel more severe effects. When air quality reaches 201-300, it is considered a very unhealthy level, and health risks increase for everyone in the area. When it crosses 300, it becomes hazardous, meaning that the air is of extremely poor quality and poses serious health risks to everyone.

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#12871974

17 Oct 2025

Smoke billows from a residential area in Kathmandu, Nepal, on October 17, 2025, as a thin layer of smog shrouds the atmosphere of the bowl-shaped valley, with the Air Quality Index measuring above 100. The average readings of Kathmandu's pollution exceed annual average concentrations of PM2.5 of 5 ug/m3, while 24-hour average exposures should not exceed 15 ug/m3 more than 3 to 4 days per year, as prescribed by the World Health Organization. PM2.5 refers to particulate matter (solid or liquid droplets) in the air less than 2.5 micrometres in diameter. It is among the most dangerous pollutants that can get past the nose and throat to penetrate the lungs and even the bloodstream. PM2.5 particles are small and are also likely to stay suspended in the air for long, increasing the chances of people inhaling them. According to Nepal's Environmental Protection Agency's air quality index, an air quality reading of 151-200 is considered unhealthy, causing everyone to experience problems and sensitive groups to feel more severe effects. When air quality reaches 201-300, it is considered a very unhealthy level, and health risks increase for everyone in the area. When it crosses 300, it becomes hazardous, meaning that the air is of extremely poor quality and poses serious health risks to everyone.

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#12871975

17 Oct 2025

A portion of Kathmandu, Nepal, is covered by a thin layer of smog that shrouds the atmosphere of the bowl-shaped Kathmandu Valley on October 17, 2025, with the Air Quality Index measuring above 100. The average readings of Kathmandu's pollution exceed the annual average concentrations of PM2.5 of 5 ug/m3, while 24-hour average exposures should not exceed 15 ug/m3 more than 3-4 days per year, as prescribed by the World Health Organization. PM2.5 refers to particulate matter (solid or liquid droplets) in the air less than 2.5 micrometres in diameter. It is among the most dangerous pollutants that can get past the nose and throat to penetrate the lungs and even the bloodstream. PM2.5 particles are small and are also likely to stay suspended in the air for long, increasing the chances of people inhaling them. According to Nepal's Environmental Protection Agency's air quality index, an air quality reading of 151-200 is considered unhealthy, causing everyone to experience problems and sensitive groups to feel more severe effects. When air quality reaches 201-300, it is considered a very unhealthy level, and health risks increase for everyone in the area. When it crosses 300, it becomes hazardous, meaning that the air is of extremely poor quality and poses serious health risks to everyone.

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#12151126

12 Mar 2025

A view of the waxing crescent moon is covered with a thick haze of fine dust particles in a country village in Sangju, South Korea, on March 13, 2025. Environmental authorities enforce emergency emission reduction measures in South Korea for the first time this year due to heavy ultrafine dust concentrations.

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#12151127

12 Mar 2025

A view of the waxing crescent moon is covered with a thick haze of fine dust particles in a country village in Sangju, South Korea, on March 13, 2025. Environmental authorities enforce emergency emission reduction measures in South Korea for the first time this year due to heavy ultrafine dust concentrations.

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#12120949

4 Mar 2025

The mayor of Pozzuoli issues an urgent order after abnormal concentrations of carbon dioxide are detected in an area bordering Naples and the Phlegrean municipality. The images show the crater and homes in the areas affected by the measure, which particularly affects underground, semi-underground, and/or poorly ventilated rooms.

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#12120950

4 Mar 2025

The mayor of Pozzuoli issues an urgent order after abnormal concentrations of carbon dioxide are detected in an area bordering Naples and the Phlegrean municipality. The images show the crater and homes in the areas affected by the measure, which particularly affects underground, semi-underground, and/or poorly ventilated rooms.

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#12120951

4 Mar 2025

The mayor of Pozzuoli issues an urgent order after abnormal concentrations of carbon dioxide are detected in an area bordering Naples and the Phlegrean municipality. The images show the crater and homes in the areas affected by the measure, which particularly affects underground, semi-underground, and/or poorly ventilated rooms.

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#12120952

4 Mar 2025

The mayor of Pozzuoli issues an urgent order after abnormal concentrations of carbon dioxide are detected in an area bordering Naples and the Phlegrean municipality. The images show the crater and homes in the areas affected by the measure, which particularly affects underground, semi-underground, and/or poorly ventilated rooms.

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#12120953

4 Mar 2025

The mayor of Pozzuoli issues an urgent order after abnormal concentrations of carbon dioxide are detected in an area bordering Naples and the Phlegrean municipality. The images show the crater and homes in the areas affected by the measure, which particularly affects underground, semi-underground, and/or poorly ventilated rooms.

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#12120954

4 Mar 2025

The mayor of Pozzuoli issues an urgent order after abnormal concentrations of carbon dioxide are detected in an area bordering Naples and the Phlegrean municipality. The images show the crater and homes in the areas affected by the measure, which particularly affects underground, semi-underground, and/or poorly ventilated rooms.

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#11704616

25 Oct 2024

Indian security personnel stand guard along a road in Srinagar, Jammu and Kashmir, on October 25, 2024. Security is increased across Kashmir following an uptick in militant attacks. Militants ambush an army vehicle in the Gulmarg area of north Kashmir last evening, resulting in the deaths of nearly three army soldiers and two army porters. At least six migrant workers and a doctor are shot dead in another attack in Kashmir this week when militants open fire near a tunnel construction site. Multiple search operations are launched at several locations, especially in Ganderbal district and the surrounding areas of Gulmarg, to apprehend the attackers. Security is also on high alert in other areas, particularly where there are higher concentrations of migrant or non-local workers, to ensure their safety.

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#11704617

25 Oct 2024

An Indian security personnel watches over as he guards along a road in Srinagar, Jammu and Kashmir, on October 25, 2024. Security is beefed up across Kashmir following an uptick in militant attacks. Last evening, militants ambush an army vehicle in the Gulmarg area of north Kashmir, resulting in the killing of nearly three army soldiers and two army porters. At least six migrant workers and a doctor are shot dead in another attack in Kashmir this week when militants open fire near a tunnel construction site. Multiple search operations are launched at several locations, especially in the Ganderbal district and the surrounding areas of Gulmarg, to apprehend the attackers. Security is also on high alert in other areas, particularly where there are higher concentrations of migrant or non-local workers, to ensure their safety.

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#11704618

25 Oct 2024

An Indian security personnel watches over as he guards along a road in Srinagar, Jammu and Kashmir, on October 25, 2024. Security is beefed up across Kashmir following an uptick in militant attacks. Last evening, militants ambush an army vehicle in the Gulmarg area of north Kashmir, resulting in the killing of nearly three army soldiers and two army porters. At least six migrant workers and a doctor are shot dead in another attack in Kashmir this week when militants open fire near a tunnel construction site. Multiple search operations are launched at several locations, especially in the Ganderbal district and the surrounding areas of Gulmarg, to apprehend the attackers. Security is also on high alert in other areas, particularly where there are higher concentrations of migrant or non-local workers, to ensure their safety.

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#11704619

25 Oct 2024

An Indian security personnel stands guard along a road in Srinagar, Jammu and Kashmir, on October 25, 2024. Security is increased across Kashmir following an uptick in militant attacks. Militants ambush an army vehicle in the Gulmarg area of north Kashmir last evening, resulting in the deaths of nearly three army soldiers and two army porters. At least six migrant workers and a doctor are shot dead in another attack in Kashmir this week when militants open fire near a tunnel construction site. Multiple search operations are launched at several locations, especially in Ganderbal district and the surrounding areas of Gulmarg, to apprehend the attackers. Security is also on high alert in other areas, particularly where there are higher concentrations of migrant or non-local workers, to ensure their safety.

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