A combination of behaviour change campaigns and technology could help to keep air pollution at a minimum in schools

WCRAQ is organising a webinar on 14 March 2023, in conjunction with the University of Surrey, GCARE and Global Action Plan on this topic. If you are interested in attending, please, email [email protected].

Creating campaigns that tap the diverse community around many of the UK’s schools could help to keep air pollution low, especially as much of the country experiences the cost-of-living crisis, according to a new study from the University of Surrey.

Surrey’s Global Centre for Clean Air Research (GCARE) found that campaigns aimed at changing the behaviour of parents, teachers and the local community, such as ‘school street’, can reduce outdoor nitrogen dioxide exposure by up to 23 per cent compared to business-as-usual activities. However, the study’s authors believe behavioural change campaigns should be more inclusive and should consider the school’s diverse communities and the local population.

Professor Prashant Kumar, the corresponding author of the study and founding- Director of the GCARE at the University of Surrey, said: ‘Schools are going through lean times where every penny matters, and while some of the effective technologies in this study may appear unrealistic, the success of behavioural campaigns is clear from the evidence. Our analysis indicates that school exposure levels drop significantly when local communities come together to raise awareness of air pollution.

‘However, it is important that schools consider the rich diversity of the school community and their general local community. Health could be significantly improved and even lives saved through more air pollution awareness campaigns targeting parents, schools and children, business owners, and the general public living around the school itself. Ideally, this would be in addition to air-cleaning technologies – and those responsible for school and healthcare funding should act on this. But a real difference can be made even in isolation through community-based behavioural changes.’

GCARE researchers conducted a comprehensive literature review of how several technologies, such as HVAC (heating, ventilation and air conditioning) systems, air purifiers, and behavioural changes can impact the concentration of pollution particles* in classrooms.

The study also highlighted that installing ventilation and air conditioning systems with high-efficiency filters could reduce by up to 30 per cent the concentration of fine particulate matter in classrooms compared with ambient concentration.

Their study also pointed out that air purifiers are effective in reducing the concentration of harmful particles by up to 57 per cent compared with no air purifier, and some were also able to reduce allergens, viruses and bacteria. Interestingly, indoor plants were shown to reduce volatile organic compounds by up to 73 per cent compared with no indoor plants in the classroom.

Professor Kumar, commented: ‘If a school is fortunate enough to install many of these interventions, the big takeaway is that they should not be used in isolation. For example, air purifiers will not magically produce fresh air within a space. Therefore, a holistic approach to how these technologies and campaigns can work in a school context will be key to making sure that clean air is available to as many children as possible in the classroom.’

This study has been published in the journal Science of Total Environment. This work builds upon GCARE’s pioneering research around school guidance that has been released in over 20 countries and numerous co-designed studies with schools.

This work has been supported by the UKRI projects (EP/W001411/1; EP/T003189/1; EP/V052462/1) and network (EP EP/W034034/1; NE/V002341/1) projects.

Note  *Black Carbon, Ultrafine (PM0.1), fine (PM0.1-2.5) and coarse (PM2.5-10) particles

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Materials provided by University of SurreyNote: Content may be edited for style and length.

Journal Reference:

  1. Nidhi Rawat, Prashant Kumar. Interventions for improving indoor and outdoor air quality in and around schoolsScience of The Total Environment, 2023; 858: 159813 DOI: 10.1016/j.scitotenv.2022.159813