Ozone

Order of the National Green Tribunal regarding ozone pollution across urban India, 21/03/2025

Order of the National Green Tribunal in the matter of News Item titled “CSE report finds dangerous increase in ozone pollution across urban India” appearing in Down to Earth dated 06.08.2024. The Principal Bench of the NGT heard the matter on March 21, 2025. In the original application, registered suo …

Environment Ministry seeks help, Tackling ozone depleting substances

The Environment Ministry required the support of Government and Non-Governmental Organizations (NGOs) to eliminate ozone depleting substances (ODS) in the atmosphere, Environment and Renewable Energy Minister Susil Premajayantha said. Addressing a workshop, organised by the National Ozone Unit (NOU) and Sri Lanka Customs, to introduce new Customs symbols, last Friday …

Worldwide air pollution deaths per year number over 2 million

Air pollution may be responsible for more than 2 million deaths around the world each year, according to a new study. The study estimated that 2.1 million deaths each year are linked with fine particulate matter, tiny particles that can get deep into the lungs and cause health problems, Huff …

Ambient ozone concentrations and the risk of perforated and nonperforated appendicitis: A multicity case-crossover study

Environmental determinants of appendicitis are poorly understood. Past work suggests that air pollution may increase the risk of appendicitis. The researchers investigated whether ambient ground-level ozone (O3) concentrations were associated with appendicitis and whether these associations varied between perforated and nonperforated appendicitis.

Beijing, Tianjin and Hebei hit hardest by pollution

Air pollution, including high ozone levels, is most severe in Beijing, Tianjin and Hebei province, according to a report released by the Environmental Protection Ministry on Wednesday. Almost 40 percent of the 74 cities with publicized readings for fine particles failed to meet the national standard for three months or …

State of the climate in 2012

Worldwide, 2012 was among the 10 warmest years on record according to the 2012 State of the Climate report released by the American Meteorological Society (AMS). The peer-reviewed report, with scientists from NOAA’s National Climatic Data Center in Asheville, NC serving as lead editors, was compiled by 384 scientists from …

Air quality monitoring units due soon

The Department of Motor Traffic (DMT) will soon obtain the much-needed permanent Ambient Air Quality Monitoring Units which they plan to set up in Colombo and Kandy to monitor poisonous gases like Sulphur dioxide, Nitrogen oxide, Carbon monoxide, Ozone, Hydro carbon and other particulate matter in the air. Vehicle Emission …

CEA gets air quality monitoring unit

The Motor Traffic Department granted a Mobile Ambient Air Quality Monitoring Unit to the Central Environmental Authority (CEA) last Thursday to keep a tab on atmospheric pollution. The financial provisions for the mobile unit was provided under the Vehicular Emission Test Trust Fund, and it was received by CEA Chairman …

EPA Ozone Pollution Standard Upheld by U.S. Appeals Court

The U.S. Environmental Protection Agency’s 2008 standards for ozone pollution, challenged by both industry and environmentalists, were upheld by a federal appeals court that ruled the agency properly weighed science and policy. More than a dozen states sued the regulator in 2008 during the administration of President George W. Bush, …

Air pollution kills over two million people each year

Human-caused outdoor air pollution may be responsible for over two million deaths worldwide - a large number of them in South Asia and East Asia - each year, US researchers have said. A study, published in the journal Environmental Research Letters, has estimated that around 470,000 people die each year …

Global premature mortality due to anthropogenic outdoor air pollution and the contribution of past climate change

Increased concentrations of ozone and fine particulate matter (PM2.5) since preindustrial times reflect increased emissions, but also contributions of past climate change. Here we use modeled concentrations from an ensemble of chemistry–climate models to estimate the global burden of anthropogenic outdoor air pollution on present-day premature human mortality, and the …

Europe must tackle air pollution, warn UN scientists

Poor air quality linked to premature deaths, with London one of the worst cities in Europe for some pollutants The health effects of air pollution have been underestimated and Europe should review its laws to tackle the problem, UN scientists have concluded after a major review of new evidence. Sixty …

Global premature mortality due to anthropogenic outdoor air pollution and the contribution of past climate change

Increased concentrations of ozone and fine particulate matter (PM2.5) since preindustrial times reflect increased emissions, but also contributions of past climate change. Here we use modeled concentrations from an ensemble of chemistry–climate models to estimate the global burden of anthropogenic outdoor air pollution on present-day premature human mortality, and the …

As city sizzled, ozone reached alarming level

New Delhi: The prolonged heatwave in Delhi since May 18 not only saw extremely high temperatures ranging between 44 and 46 degrees but also led to the development of a dangerous pollutant that has become an annual feature in the capital lately. In the last week of May, levels of …

Ozone pollution in India due to power plant emissions

Coal is the primary fuel for electricity generation in India and its usage is continuously increasing to meet the energy demands of the country. This paper presents emissions from thermal power plants in India and contribution of power plant emissions in the formation of ground level ozone which shows considerable …

WMO statement on the status of the global climate in 2012

The WMO’s Statement on the Status of the Global Climate says that 2012 joined the ten previous years as one of the warmest — at ninth place — on record despite the cooling influence of a La Niña episode early in the year. The 2012 global land and ocean surface …

Los Angeles retains notorious rankings for worst smog, traffic

Los Angeles may boast some of the best weather among U.S. cities while scoring high in celebrity sightings, but the Southern California metropolis remains unable to shake off its more notorious No. 1 rankings for worst smog and heaviest traffic. Los Angeles, the nation's second-largest city, again topped the charts …

Diesel exhaust but not ozone increases fraction of exhaled nitric oxide in a randomized controlled experimental exposure study of healthy human subjects

Fraction of exhaled nitric oxide (FENO) is a promising non-invasive index of airway inflammation that may be used to assess respiratory effects of air pollution. We evaluated FENO as a measure of airway inflammation after controlled exposure to diesel exhaust or ozone. Healthy volunteers were exposed to either diesel exhaust …

Ozone is associated with cardiopulmonary and stroke emergency hospital visits in Reykjavik, Iceland 2003--2009

Air pollution exposure is associated with hospital admissions and emergency room visits for cardiopulmonary disease and stroke. Iceland's capital area, Reykjavik, has generally low air pollution levels, but traffic and natural sources contribute to pollution levels. The objective of this study was to investigate temporal associations between emergency hospital visits …

Emissions from crop/biomass residue burning risk to atmospheric quality

Recent crop harvesting practices use mechanical harvesters in the rice and wheat farm system in India. These practices leave behind large quantities of crop residue in the field. However, there is no suitable method available for managing the crop residues. Crop residues / biomass burning are cheap and easiest method …

The state of the air 2013

The State of the Air 2013 report looks at levels of ozone and particle pollution found in official monitoring sites across the United States in 2009, 2010, and 2011. The report uses the most current quality-assured nationwide data available for these analyses. The report examines particle pollution (PM2.5) in two …

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