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WMO Press conference: Air Quality and Climate Bulletin - 05 September 2024
We must do more to keep the air we breathe clean: UN weather agency
Unchecked climate change, wildfires and air pollution continue to have “a spiralling, negative impact on health, ecosystems and agriculture”, with millions of deaths attributed to dirty air, the UN World Meteorological Organization (WMO) said on Thursday.
“Almost everybody on Earth, basically nine out of 10 people breathe air that is essentially unfit for purpose,” said Lorenzo Labrador, Scientific Officer at WMO. “This means that it is air that exceeds the [UN World Health Organization] WHO guideline limits and contains a high level of pollutants with low and middle-income countries basically being the most affected.”
Heat driver
That stark finding is just one of many unsettling discoveries featuring in the latest WMO Air Quality and Climate Bulletin. It highlights, for instance, that the first eight months of 2024 have seen no let-up in periods of intense heat and persistent droughts around the world, fuelling the risk of wildfires and air pollution.
“Climate change means that we face this scenario with increasing frequency. Interdisciplinary science and research is key to finding solutions,” the UN agency warned.
The clear link between polluted air and poor health is clear, according to the WHO, which has urged global action to counter “one of the greatest environmental risks to health” and numerous preventable illnesses including stroke, heart disease, lung cancer and acute respiratory diseases, including asthma.
“Ambient air pollution alone mostly coming from vehicles and industry causes more than 4.5 million premature deaths a year,” WMO’s Mr. Labrador told journalists in Geneva.
“This is more than those death by malaria and HIV AIDS combined; so air pollution is the biggest environmental risk of our time. But not only is it a health risk in itself, it also exacerbates climate change.”
Regional trends
A snapshot of regional emissions variations featured in the UN agency report indicated a trend for “lower pollution in Europe and China” than North America and India, where there was an increase in pollution emissions from human and industrial activities.
This is likely the “direct result of a reduction in emissions in those countries over the years, and we have been noticing this tendency since we started publishing the bulletin back in 2021.”
And while it is generally widely understood that polluted air containing microscopic particulates - including sulphates, nitrates, ammonia, soot from human activity and wildfires - is harmful, Mr. Labrador reiterated the UN agency’s 2023 findings that these and other pollutants have a damaging impact on food security, too.
Crop yields down
“Particulate matter can severely affect the productivity of crops - of staple crops - such as maize, rice and wheat,” he said. “Many of this particulate matter pollution that affect crop yields are due to man-made practices, which include the land use practices such as tillage and harvesting. Also, application of fertilizers and stubble-burning at the end the season, of the growing seasons.”
New data-crunching on naturally occurring wildfires around the world last year also indicated that the inferno that spread across Canada in 2023 “was even stronger with respect to emissions” than the 2021 wildfire season in Siberia – although that was “very, very strong”, the WMO officer insisted.
“[The Canada fires] broke records concerning the amount of surface area burned over a 20-year period.”
To coincide with this year’s Clean Air for Blue Skies Day on Saturday 7 September, the UN agency urged governments to protect health, the environment and the economy, given the cost ramifications of the air pollution.
“The first thing that cities have to do is to recognize that the problem exists in the first place,” Mr. Labrador said. “So, those cities and those countries have to acknowledge first that there is an air quality problem and there is sufficient data around the world to basically acknowledge that it is a worldwide problem, particularly in urban areas.”
Story: WMO Press conference: Air Quality and Climate Bulletin
TRT: 03’08”
SOURCE: UNTV CH
LANGUAGE: ENGLISH / NATS
ASPECT RATIO: 16:9
DATELINE: 05 September 2024 - GENEVA, SWITZERLAND
RESTRICTIONS: NONE
SHOTLIST
- Exterior medium shot: UN flag alley.
- Wide shot of the podium at the press conference room.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “Almost everybody on Earth, basically nine out of 10 people breathe air that is essentially unfit for purpose. This means that it is air that exceeds the WHO guideline limits and contains a high level of pollutants with low and middle-income countries basically being the most affected.”
- Medium-wide, podium speakers and Press room.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “Ambient air pollution alone mostly coming from vehicles and industry causes more than 4.5 million premature deaths a year. Just for context, this is more than those death by malaria and HIV AIDS combined; so air pollution is the biggest environmental risk of our time. But not only is it a health risk in itself, it also exacerbates climate change.”
- Medium, podium speakers from above, TV screens showing speakers in Press room.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “We tend to believe that the lower pollution in Europe and China are the direct result of a reduction in emissions in those countries over the years, and we have been noticing this tendency since we started publishing the bulletin back in 2021. So, we can say that we are starting to see a tendency in that regard.”
- Medium-wide, podium speakers and Press room.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “Whereas particulate matter is responsible for about eight million premature death a year worldwide, you would not find surprising that the focus is usually on the effects of particular matter on health. However, a 2023 World Meteorological Organization report pointed out that particulate matter can severely affect the productivity of crops - of staple crops - such as maize, rice and wheat.
- Medium-close, TV screen showing Mr. Labrador.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “Many of this particulate matter pollution that affect crop yields are due to man-made practices, which include the land use practices such as tillage and harvesting. Also, application of fertilizers and stubble-burning at the end the season, of the growing seasons.”
- Medium, speaker’s hands on desk and screen.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “We reported back in 2022 about the 2021 wildfire season in Siberia, which was very, very strong. But there are indications that the wildfire that we had in Canada last year was even stronger with respect to emissions. It broke records concerning the amount of surface area burned over a 20-year period in Canada.”
- Medium-wide, raised shot of podium speakers and Press room.
- SOUNDBITE (English) Lorenzo Labrador, Scientific Officer, WMO: “The first thing that cities have to do is to recognize that the problem exists in the first place. So, those cities and those countries have to acknowledge first that there is an air quality problem and there is sufficient data around the world to basically acknowledge that it is a worldwide problem, particularly in urban areas.”
- Wide, podium and speakers with UN logo providing backdrop.
- Medium, journalist.
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As world’s water reserves change, countries must prepare for a new reality: WMO
New data showing that rivers were at their lowest level for decades last year provides further evidence that the climate crisis is real and countries must act immediately to protect themselves from the increasing threat to communities and livelihoods, the UN World Meteorological Organization (WMO) said on Thursday.
The key findings from WMO’s State of Global Water Resources 2025 report covering the hydrological cycle and extreme events in the five-year period to last year:
- 2025 was one of driest years for river discharge in 35 years
- Past seven years have seen abnorfmal river flows
- Water storage on Earth’s land surface has decreased in past decade
- Widespread glacier loss across all regions for fourth consecutive year
- Asia and Africa are regions most affected by water-related disasters
- Water data availability has improved, but gaps remain in hard-hit areas
Highlighting the long-term decline in the Earth’s freshwater storage and glacier melt, WMO Secretary-General Celeste Saulo explained that the planet’s water reserves used to act as a planetary “savings account” that absorbed the occasional dry season, avoiding a water crisis. “One of the central stories of the 2025 report is what is happening to that savings account? And the simple answer is that we are depleting it,” she told journalists in Geneva.
Groundwater reserves are equally stretched and have been in decline since 2014, WMO’s report states, with nearly two-thirds of monitored wells worldwide showing levels lower than the historical norm and indicating a shift “further toward deficit…not recovery”.
“At the same time, we are seeing more water-related disasters,” Ms. Saulo said, while also stressing that the currently strengthening El Niño “will increase the risk of drought in some areas, and flooding in others”.
Glaciers disappearing
In 2025, for the fourth consecutive year, every major glaciated region on Earth lost ice mass, leading to short-term hazards including floods and long-term water insecurity, according to WMO.
Responding to a question about whether the changing global water cycle might have contributed to the deadly Nepal-China flooding disaster, Ms. Saulo explained that melting ice and rock was just one factor in the chain of events that ultimately sent a massive and deadly wall of water and debris downstream on 26 August, killing at least 1,367 people.
“You asked if it could happen again? Absolutely; the problem in this region is that there’s 63,700 glaciers at the last count,” she told a Press Conference in Geneva. “Even if you’re looking with remote sensing with satellites at these glaciers, you might see some faults, you might see some slight shifting, that does not mean necessarily catastrophic collapse. So, in order to plan for this, it’s very, very difficult. But the international community is looking very hard at ways in which we can bring people together to solve some of these monitoring issues.”
Data indicates that glaciers shrank between 2023 and 2025 with cumulative losses of 1,400 gigatonnes of water – or about one third of annual fresh water needs.
Every major glacier region on Earth lost ice for the fourth consecutive year.
“All 19 glacier regions around the globe lost ice; in Central Asia, Iceland, the Russian Arctic and western Canada and the United States, it was among the three worst years on record,” said Wayne Jenkinson, WMO’s Director of Hydrology and Cryosphere.
Some regions with smaller glaciers such as Central Europe, the Caucasus, the western Canada and the United States may already have reached “peak water”, Mr. Jenkinson warned.
“After this point, the glacier gives less meltwater each year simply because there is less ice left to melt. That matters for every community downstream that relies on water during hot, dry summers,” he explained.
Narelle van der Wel, WMO’s Head of Cryosphere Monitoring, Predictions and Services, stressed that while some further glacier loss is unavoidable, the eventual scale of the decline is not predetermined.
“Some glacier loss is inevitable, but total loss of glaciers is not yet inevitable,” she said, pointing to emissions reductions as central to limiting future losses.
Preparing for moving baselines
The report does not attribute every observed change to climate change alone. WMO says pressure on water resources and natural variability also contribute.
Mr. Jenkinson said governments need to prepare for “moving baselines” as historical patterns become less reliable.
“The situation 30 years ago is not where we are today,” he said. Countries, he added, need to prepare “for those changes that have really already arrived”.
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