World weather agency warns of vicious cycle in air and climate

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Fossil fuel burning and other human activities that contribute to climate change are

In the Air Quality and Climate Bulletin released for the International Day of Clean Air for Blue Skies to be marked on September 7, the UN specialized agency details the dangerous feedback loop between climate change and air pollution, driven significantly

Flames from the Gifford Fire race up a hillside in Los Padres National Forest, California, U.S., August 4, 2025. /VCG

The report highlights the role of aerosols in wildfires, winter fog, shipping emissions and urban pollution, while stressing the need for improved atmospheric monitoring and more integrated policies to safeguard human and environmental health and reduce agricultural and economic losses.

Particulate matter from activities such as transport, industry and agriculture, as well as from wildfires and wind-blown desert dust, remains a major health hazard, says the report.

Ambient air pollution causes more than 4.5 million premature deaths each year worldwide with huge environmental and economic costs, according to World Health Organization estimates.

A sandstorm drives PM2.5 concentrations to a "severe pollution" level in Seoul, South Korea, March 13, 2025. /VCG

The WMO report notes that wildfires are a major

Meanwhile, it highlights that although fog is a seasonal occurrence, its growing frequency and duration are increasingly linked to pollution from vehicles, construction, heating, cattle and the burning of vegetation.

"Climate impacts and air pollution respect no national borders – as exemplified

(Cover: Flares burn off excess natural gas at the Endeavor Energy Re

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