More frequent and intense heatwaves and wildfires driven by climate change are expected to worsen the quality of the air we breathe, harming human health and ecosystems, the UN warned Wednesday.
A new report from the UN’s World Meteorological Organization (WMO) cautioned that the interaction between pollution and climate change would impact hundreds of millions of people over the coming century, and urged action to rein in the harm.
The WMO’s annual Air Quality and Climate Bulletin examined the impacts of large wildfires across Siberia and western North America in 2021, finding that they produced widespread increases in health hazards, with concentrations in eastern Siberia reaching “levels not observed before”.
Tiny particles with a diameter of less than 2.5 micrometres (PM2.5) are considered particularly harmful since they can penetrate deep into the lungs or cardiovascular system.
“As the globe warms, wildfires and associated air pollution are expected to increase, even under a low emissions scenario,” WMO chief Petteri Taalas said in a statement.
“In addition to human health impacts, this will also affect ecosystems as air pollutants settle from the atmosphere to Earth’s surface.”
‘Foretaste of the future’
At the global scale, there has been a reduction over the past two decades in the total burned area, as a result of decreasing numbers of fires in savannas and grasslands.
But WMO said that some regions like western North America, the Amazon and Australia were seeing far more fires.
Even beyond wildfires, a hotter climate can drive up pollution and worsen air quality.
Taalas pointed out that severe heatwaves in Europe and China this year, coupled with stable high atmospheric conditions, sunlight and low wind speeds, had been “conducive to high pollution levels,” warning that “this is a foretaste of the future.”
“We expect a further increase in the frequency, intensity and duration of heatwaves, which could lead to even worse air quality,” he said.
This phenomenon is known as the “climate penalty”, which refers to how climate change amplifies ground-level ozone production, which negatively impacts air quality.
In the stratosphere, ozone provides important protection from cancer-causing ultraviolet rays, but closer to the ground it is very hazardous for human health.
If emission levels remain high, this climate penalty is expected to account for “a fifth of all surface ozone concentration increase,” WMO scientific officer Lorenzo Labrador told reporters.
He warned that most of that increase will happen over Asia, “and there you have about one quarter of the entire world population.”
The WMO called for action, stressing that “a worldwide carbon neutrality emissions scenario would limit the future occurrence of extreme ozone air pollution episodes.”
The report points out that air quality and climate are interconnected, since chemicals that worsen air quality are normally co-emitted with greenhouse gases.
“Changes in one inevitably cause changes in the other,” it said.Heatwaves and wildfires to worsen air pollution: UN
Pollution Masks since 1993 - The 'Original' and still the best - Made in the UK
THE AIR WE BREATHE
The Respro® Bulletin Board is designed to keep you up to date with current views and issues relating to Air Pollution and its health implications in our daily lives.
WATCH OUR ANIMATION
TOP POSTS AND PAGES
- Follow Respro® Bulletin Board on WordPress.com
LOCAL AIR QUALITY
WHY WEAR A MASK?
Essential features required of a mask to work properly: Why wear a mask?
KEY POINTS TO A MASK
Three important points to look out for in an air pollution mask:
Key Points to a Mask
TIME TO CHANGE YOUR FILTER?
THERE ARE FOUR RESPRO® FILTER TYPES
HOW TO CHANGE THE FILTER
BUY NEW FILTERS
RESPRO® ON INSTAGRAM
Air Pollution Air Quality Asthma Beijing Boris Johnson California Canada China Delhi Department for Environment Food and Rural Affairs (Defra) diesel exhaust fumes EU - European Union Europe forest fire France Germany HAZE Health Effects of Air Pollution India Indonesia Iran King's College London London London Mayor Malaysia Nitrogen Dioxide NO2 NOx Ozone O3 Paris PM - Particulate Matter PM2.5 PM10 Research Respro® Masks FAQ Respro® Products Scotland Singapore Smog Spain Sulfur Dioxide SO2 UK USA vehicle emissions wildfires World Heath Organization (WHO)
- Air Quality
- Australia & Oceania
- Exercise & Air Pollution
- Health Effects of Air Pollution
- Help & FAQs
- Latin America
- Medical Studies
- Middle East
- Research on Air Pollution in the UK
- Respro® How To Videos
- Respro® Mask Reviews
- Respro® Masks
- Respro® Products
- South Korea
- USA & Canada
- World News