Disclaimer: We may earn a commission if you make any purchase by clicking our links. Please see our detailed guide here.

Follow us on:

Even ‘safe’ ambient CO levels may harm health: Study

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.

Join the Opinion Leaders Network

Join the Techgenyz Opinion Leaders Network today and become part of a vibrant community of change-makers. Together, we can create a brighter future by shaping opinions, driving conversations, and transforming ideas into reality.

A team of researchers has found that even a slight increase in ambient carbon monoxide levels from automobiles and other sources are associated with increased mortality.

The study, published in The Lancet Planetary Health, also found that even short-term exposure to ambient carbon monoxide (CO) — at levels below the current air quality guidelines and considered safe — had an association with increased mortality.

These findings have significant public health implications, – said researcher Kai Chen, Assistant Professor from Yale University in the US.

“Millions and millions of people live in environments with elevated CO levels and in environments where the CO levels are within the current guidelines considered ‘safe range,” Chen added.

For the study, the research team collected data from 337 cities across 18 countries and analyzed data, including a total of 40 million deaths from 1979 to 2016, and ran it through a statistical model.

Overall, a one milligram per cubic metre increase in the average CO concentration of the previous day was associated with a 0.91 per cent increase in daily total mortality, the study found.

The team also discovered that the exposure-response curve was steeper at daily CO levels lower than one milligram per cubic meter, indicating a greater risk of mortality per increment in CO exposure, and this persisted at daily concentrations as low as 0.6 mg/mA or less.

The findings reveal that there is no evidence for a threshold value below which exposure to ambient CO can be considered “safe.”

The US National Ambient Air Quality Standard for ambient CO (approximately 7 milligram per cubic metre for the daily average) was established in 1971 and has not been revisited for the past five decades.

The same air quality guideline for CO has been applied in other regions such as Europe, whereas a lower value of 4 milligrams per cubic meter was established as China’s air quality standard.

The study’s findings strongly suggest the need to revisit global and national air quality guidelines for CO and, in addition to single-pollutant standards, policies should also be expanded to address traffic-related air pollution mixtures.

Partner With Us

Digital advertising offers a way for your business to reach out and make much-needed connections with your audience in a meaningful way. Advertising on Techgenyz will help you build brand awareness, increase website traffic, generate qualified leads, and grow your business.

Join 10,000+ Fellow Readers

Get Techgenyz’s roundup delivered to your inbox curated with the most important for you that keeps you updated about the future tech, mobile, space, gaming, business and more.


Find Apps

The Ultimate Hub for Discovering Apps Unlock a world of apps: your ultimate hub for exploring and discovering limitless possibilities for on your every needs.

Power Your Business

Solutions you need to super charge your business and drive growth

More from this topic