News Release

Pollution-tracking citizen science project offers New York students a breath of fresh air

Fordham University researchers partner with Bronx schools to collect air quality data, highlight impacts of climate change and economic inequality

Peer-Reviewed Publication

American Institute of Physics

Incidence of asthma-related emergency room visits by children in NYC and an air quality sensor


Left: Incidence of asthma-related emergency room visits by children in New York City neighborhoods, along with air quality data collected by a FRESH Air site in one of those neighborhoods. Right: One of the sensors distributed among schools and community centers as part of FRESH Air.

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Credit: Stephen Holler

WASHINGTON, Jan. 4, 2024 – Climate change is one of the biggest issues of the 21st century, a crisis that affects the fate of the entire world as well as our place in it. A warming Earth will destroy ecosystems, flood cities, and lead to countless suffering and death for people worldwide. Part of the challenge of dealing with climate change is helping people understand its complex impacts.

In The Physics Teacher, co-published by AIP Publishing and the American Association of Physics Teachers, researchers from Fordham University partnered with middle and high schools in the Bronx and Manhattan in a citizen science project to collect real-time air quality data. Their project, Fordham Regional Environmental Sensor for Healthy Air (FRESH Air) seeks to improve air quality data while educating the community about the effects of climate change.

The researchers supplied students with commercial air quality sensors along with kits to build their own, which collected indoor and outdoor air pollution measurements at their schools. In the process, those students learned about one of the most immediate effects of climate change.

“We identified asthma, especially childhood asthma, as being a major concern among members of the Bronx community,” said author Stephen Holler. “Respiratory diseases like asthma have a strong connection to air quality, which is negatively impacted by the changing climate. This became the focal point for the project: to educate the Bronx community about climate change through the negative impacts of air quality that are adversely affecting them on a daily basis.”

Thanks to the air quality sensors and the data they produced, students could draw connections between the quality of their air and the health of their planet.

“In June 2023, the students witnessed an orange haze over New York City due to extensive wildfires in eastern Canada, which were a consequence of the warming climate,” said Holler. “This provided a first-hand experience of the connection between the changing climate and the air they breathe.”

The data collected thanks to FRESH Air has revealed more than just impacts from climate change. This study also highlighted disparities between schools in low-income and high-income communities.

“As we partner with the schools and community organizations, we are getting a picture of the asymmetric distribution of pollution,” said Holler. “At some locations, indoor air quality closely tracks outdoor air quality, indicating that some schools are ‘leaky’ and not filtering out particulate matter, exposing students and staff to potential respiratory and cardiovascular disease.”

Ultimately, the researchers at Fordham hope to inspire more students to develop an interest in science.

“The citizen science aspect of the project enables the students and communities to feel they are part of a scientific endeavor and one that has a direct impact on their lives,” said Holler. “Many people do not understand that the scientific process is fundamentally a shared experience. As one of my colleagues is fond of saying, ‘Science is something we do all together.’”


The article “Project FRESH Air: A community engagement project about health and climate” is authored by Stephen Holler, Usha Sankar, Mark McNeil, Melanie Knuts, and Jahred Jack. It appears in The Physics Teacher on Jan. 4, 2024 (DOI: 10.1119/5.0136945) and can be accessed at


Dedicated to the strengthening of the teaching of introductory physics at all levels, The Physics Teacher includes tutorial papers, articles on pedagogy, current research, and news in physics, as well as history, philosophy, and biography. See


AAPT is an international organization for physics educators, physicists, and industrial scientists with members worldwide. Dedicated to enhancing the understanding and appreciation of physics through teaching, AAPT provides awards, publications, and programs that encourage teaching practical application of physics principles, support continuing professional development, and reward excellence in physics education. AAPT was founded in 1930 and is headquartered in the American Center for Physics in College Park, Maryland.


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