A new study has assessed the potential of several “fast-action” climate change mitigation strategies. Key options are reducing use of hydrofluorocarbons (HFCs), reducing emissions of black carbon and ozone-forming pollutants, and sequestering carbon through afforestation and biochar production.

New research has found a possible link between traffic-related air pollution outside people's homes and the onset of asthma in children during the first eight years of life. Higher levels of nitrogen dioxide, PM2.5 and soot were more likely to be recorded at the homes of those children who developed asthma and asthma symptoms.

A recent assessment suggests that reducing black carbon emissions, produced by burning carbon-based materials, would prevent millions of premature deaths in developing countries as well as helping meet climate change mitigation targets.

New research has recorded high levels of airborne aerosol black carbon (BC) in Lithuania during two periods in 2008 and 2009. Further investigation indicated this is from smoke produced by wildfires in Ukraine and southwest Russia, which then travels northwards.

Existing technologies could reduce emissions of CO2 and air pollutants from land transport by almost a third. But, reductions will not be delivered through markets alone, according to a recent assessment, particularly for CO2. The researchers argue that strong policy interventions will be essential to mitigating climate change caused by emissions from land transport.

A recent study assesses new methods for comparing and predicting air quality data in Helsinki, Finland and Thessaloniki, Greece, that significantly improve the capability to analyse and predict air quality in these cities. There are good indications that the methods could be applied to other European cities.

Agriculture is a significant source of greenhouse gas (GHG) emissions. Researchers have developed a framework for estimating emissions of methane and nitrous oxides from agriculture, by updating the International Panel on Climate Change (IPCC) approach, which captures more detail about differences between locations.

Living near busy roads is associated with an increased risk of childhood leukaemia, according to French researchers. The study found that children living within 500 metres of major roads were more likely to develop leukaemia than those who lived far from such roads. It is possible that high levels of traffic pollution from the roads are responsible for the higher rates of the illness.

Using hydrogen as an energy carrier can help reduce air pollution and greenhouse gas (GHG) emissions associated with fossil fuels, according to recent research. However, if used on a large-scale, it is important that hydrogen does not leak significantly into the atmosphere as it might have some negative environmental effects, such as increasing the lifetime of methane, increasing climate effects and causing some depletion of the ozone layer.

Scientists have created a new, easy-to-use tool that allows health professionals to monitor the day-to-day risks posed by short-term exposure to main urban air pollutants. The tool could enable vulnerable groups, such as asthmatics, to take precautionary measures and to increase public awareness of the health impacts of air pollution, say the researchers.

City dwellers who grow their own fruit and vegetables may be consuming high levels of pollutants. In a recent study, researchers found that vegetables grown on plots in Berlin, Germany, often contained higher concentrations of some heavy metals than shop-bought vegetables, with those grown close to busy roads containing the greatest quantities.

Pollen allergy is a common cause of allergic respiratory diseases such as hay fever and asthma. A recent continent-wide study suggests that rising carbon dioxide (CO2) emissions over the last 30 years may be increasing pollen counts especially in European cities, which could have serious consequences for public health.

Man-made pollutants may be responsible for the expansion of the tropics in the northern hemisphere, according to recent research. Black carbon aerosols and tropospheric ozone, formed from human activities, are heating the atmosphere and shifting major atmospheric circulation patterns further north, which could create drier conditions in the subtropics.

Measures to control methane and black carbon (soot) emissions could improve air quality and public health, in addition to slowing the rate of climate change, according to recent research. By 2030, the reduced pollution could prevent between 700,000 and 4.7 million premature deaths each year, with 80% of the benefits occurring in Asia.

Pedestrians are exposed to different levels of pollution on the pavements depending on how parked cars at the roadside are arranged, according to the first in a series of new studies in this area. The researchers modelled different parking regimes and found that less pollution reached the pavement when cars were parked sideways on, rather than at an angle to the street. Their results may help urban planners design more pedestrian-friendly streets.

A study on the transport of radioactive isotopes from Fukushima in the two months after the nuclear incident suggests that they were at official levels of contamination for 34,000 km2 of Japan, and that 2.8% of iodine radionuclides from the event were calculated to have reached the EU.

More Europeans are driving diesel cars, with important implications for vehicle emissions. A new study suggests that diesel cars may emit nitrogen oxides (NOx) at levels far higher than emissions standards, even when considering the newest generation of diesel cars. Part of the problem is that tests of vehicle emissions in the laboratory do not accurately reflect on-road emissions.

A new report indicates that some progress has been made towards meeting key sustainable transport targets, but challenges remain. Improvements in passenger vehicle efficiency has led to reductions in emissions, however, reductions in oil consumption are not sufficient to meet targets, with more policy initiatives and continued monitoring needed to ensure that sustainability goals are achieved.

A strong link between long-term exposure to vehicle pollution and deaths from heart disease and lung cancer has been found in a study of over a million individuals. The researchers say their results are relevant to European policymaking relating to air quality.

Inhaling volcanic ash could weaken the body’s natural defences against infection, a recent study concludes. A team of researchers collected samples of ash from the 2010 Eyjafjallajökull volcano eruption in Iceland and, in laboratory tests, found that they reduced the ability of immune cells in lungs to fight off bacterial infections.

The most up-to-date knowledge and data must be used to assess policy objectives, new research confirms. Studying air pollution environmental quality targets set by the National Emission Ceilings (NEC) Directive1, a new study has shown that if 2001 data are used to assess progress, most such targets appear to have been met. However, more recent and accurate current data show that this may not be the case.

Air pollution from the world’s megacities not only has local impacts, but can spread to remote regions of the world. Recent research has highlighted, for example, that megacities are a source of black carbon pollution in lowest kilometre of atmosphere in the Arctic, with European megacities contributing more than others.

Air quality in the Greek city of Thessaloniki has worsened during the recent economic crisis, as residents burn more wood and other types of biomass to keep warm. A recent study has found a 30% increase in the concentration of fine particle (PM_2.5) emissions associated with wood smoke from residential heating in 2012 and 2013, with implications for the health of local residents.

Increased black smoke pollution was associated with increased mortality rates almost a month after exposure in a recent study. The researchers studied death rates in relation to pollution concentrations over a 22-year period in the city of Glasgow, UK, and found significantly higher mortality rates among residents at 13-18 and 19-24 days after increased exposure to black smoke.

Long-term exposure to particulate matter pollution is strongly linked with heart attacks and angina, a new European study of over 100 000 people has shown. The results indicate that this association exists at levels below current European limits, and that the burden of disease due to particulate matter may have been largely underestimated.

Pregnant women living within 16 km of unconventional gas wells in Colorado, US, are up to 30% more likely to give birth to a baby with a heart defect, new research has found. These findings suggest that more research is needed to understand the potential health impact of natural gas developments, say the researchers.

Traffic pollution contributes to childhood obesity, a recent study concludes. In the US investigation of over 4 500 children, the researchers estimated that air pollution increased the body mass index (BMI) of 10-year olds in the most polluted areas of study by 0.4 units, compared to those in the least polluted areas. It is thought that pollution may have slowed the children’s metabolism.

Cyclists with pollution monitors and GPS trackers attached to their bicycles have produced detailed maps of Antwerp’s air quality, as part of a recent study. Their data show that a gap of just a few metres between cycle lanes and cars significantly reduces cyclists’ risk of inhaling high levels of ultrafine particle pollution.

Elderly patients with Parkinson’s disease are at greater risk of emergency hospitalisation, as well as premature death, following short periods of increased air pollution by fine particles, finds a US study. The researchers believe that these findings support the theory that fine particles may affect the brain. They also found possible links between pollution and hospitalisation rates for diabetes patients.

Better hydrogen production could be on the horizon thanks to a cheap new way of making a key component of electrolysers with a 3D printer, a new study suggests. This achievement could speed-up the development of electrolysis, a method of extracting hydrogen from water.

Road traffic noise and air pollution both increase the risk of having a stroke, recent research from Denmark suggests. The results suggest that traffic noise is more strongly associated with ischaemic stroke, whereas only air pollution appears to be linked with more serious, fatal strokes.

Long-term exposure to air pollution may increase the risk of developing type-2 diabetes, a Swiss study has found. The results also suggest that the association between type-2 diabetes and air pollution occurs at concentrations below World Health Organization (WHO) air quality guidelines.

Real time monitoring of public health during two periods of high air pollution in the UK showed that there were an estimated 3 500 extra healthcare visits for acute respiratory symptoms and approximately 500 for severe asthma during these spells in 2014. The results of this research are presented in a new study which demonstrates the value of such ‘syndromic surveillance’ systems for exploring air quality’s effects on human health.

Emissions from well-regulated household waste incinerators do not reduce the quality of vegetables and milk produced nearby, a Dutch study suggests. Researchers found that levels of certain contaminants were similar whether vegetables and milk came from the area surrounding three incinerators, or from elsewhere in the Netherlands. They say biomonitoring programmes could offer a way to increase the understanding of the real impacts of waste incineration and to improve communication between waste management companies and local communities.

The chances of a child developing Autism Spectrum Disorder (ASD) are higher if the mother is exposed to high levels of fine particulate air pollution during pregnancy, a recent study suggests. This increased risk was associated specifically with exposure in the last three months of pregnancy, the researchers found.

Exposure to gaseous and particulate matter pollution have been found to increase the immediate risk of stroke, a review of medical studies has shown. The increased risk is most pronounced the same day as the exposure, and for fine particles the increased risk persists over several days. The authors hope information from this study will help policymakers to develop suitable controls to limit the risks posed by these harmful air pollutants.

Over 2500 tons of the air pollutants nitrogen oxides (NOx), sulphur dioxide (SO2) and particulate matter with a diameter of less than 2.5 micrometers (PM2.5) were released by cruise ships across the five busiest Greek cruise ports during 2013, a new study found. The researchers also examined the costs of the potential health impacts of this pollution, finding they could be as high as 24.3 million Euros.

A new study quantifies the economic and environmental potential of powering docked ships in European ports using local electricity networks. The authors give key recommendations on policy actions to enable implementation in European harbours.

Exposure of primary schoolchildren to outdoor green spaces is linked to an improvement in their cognitive development, finds a new study, which is the first of its kind. The association may be partly explained by reductions in traffic-related air pollution (TRAP) near green areas.

Long-term exposure to traffic-related air particle pollution is linked with type 2 diabetes, a new study in Germany has found. Furthermore, the study found that people living close to busy roads were at greater risk of developing the disease than those living further away.

Measurements of individual vehicle emissions are usually made in laboratory tests. In this study, researchers followed cars driving in real conditions to measure emissions of air pollutants, including black carbon and nitrogen oxides. The study shows that diesel cars contribute disproportionately to air pollution, and highlights the value of on-road measurements.

In September 2015, the United States Environmental Protection Agency (EPA) alleged that Volkswagen (VW) violated the US Clean Air Act by fitting ‘defeat devices’ in their light-duty diesel vehicles to falsify the results of emissions tests. According to a study assessing the potential impact of this decision, an extra 59 early deaths in the US are likely to be caused by exposure to PM2.5 and ozone.

The health risks associated with climate-induced changes to indoor environments are explored in a new study. UK-based researchers synthesised findings of how climate change — and mitigation and adaptation measures — might affect the inside of buildings, through overheating, air quality, allergies and infections, flood risk and other exposure risks.

Research using the Environmental Quality Index (EQI) linked increased risk of preterm birth with poor air quality, but not with overall low environmental quality. The study is one of the first to explore the relationship between preterm birth and environmental quality across a range of different environmental domains (including water, air, land, built environment and sociodemographic aspects).

Dangerously high air pollution in the vicinity of shipbreaking yards has been detected by a recent study, where the concentrations of toxic chemicals in the air were found to be above carcinogenic risk limits (as set by the World Health Organisation). The research, carried out in Chittagong, Bangladesh, noted that shipbreaking activities and the subsequent processing and treatment of materials – particularly the burning of waste — result in emissions of persistent organic pollutants (POPs).

A recent study develops a framework for implementing IAMs using the Lombardy region of Italy as a case study. Researchers have run an uncertainty and sensitivity analysis with an environmental model, specifically with an Integrated Assessment Model (IAM) for air quality, demonstrating how model components are sources of uncertainty in the output of an integrated assessment. Policy responses should therefore consider uncertainty and sensitivity when developing measures to improve air quality.

Mercury is a heavy metal that is well known for being the only metal that is liquid at room temperature and normal pressure. It is also a potent neurotoxin with severe global human health impacts. It can be converted from one form to another by natural processes, and, once released, actively cycles in the environment for hundreds to thousands of years before being buried in sediment. This In-Depth Report from Science for Environment Policy summarises the latest scientific studies and research results on mercury pollution in the global environment.

The most important findings from over a decade of research into environmentally persistent free radicals (EPFRs), a new class of environmental pollutants, are presented in a recent review. These toxic particles could be partly responsible for some of the health problems, such as asthma, associated with particulate matter (PM) exposure. The researchers issue a warning that some engineered nanomaterials (ENMs) could increase levels of EPFRs in the environment.

Subjective perception of air pollution can have important implications in terms of health-protective behaviours and citizen and stakeholder engagement in cleaner-air policies. A recent study, conducted under the EU-funded PASTA¹ project, has analysed the link between level of concern over health effects of air pollution and personal and environmental factors in seven European cities. Overall, 58% of participants were worried over health effects of air pollution, with large differences between cities. On a city scale, average levels of concern over health effects of air pollution had a good correlation with average NO₂ levels and a lower correlation with average PM_2.5 levels. Individual level of concern was found to be linked to gender, having children in the household, levels of physical activity, and NO₂ levels at the home address. These findings can be used to inform future policymaking.

A recent study demonstrates, for the first time, a method for tracking nitrogen oxide (NOx) emissions and applies it specifically to soils. The ‘chemical fingerprinting’ method allows soil NOx to be distinguished from other sources of NOx, such as vehicles and power plants. It, therefore, paves the way for a more precise understanding of agriculture’s contribution particularly to air pollution, climate change, ecosystems and environmental damage.