Related topics: air pollution

Earth's atmosphere more chemically reactive in cold climates

Unseen in the air around us are tiny molecules that drive the chemical cocktail of our atmosphere. As plants, animals, volcanoes, wildfires and human activities spew particles into the atmosphere, some of these molecules ...

Asian pollution, heat waves worsen US smog, study shows

An influx of pollution from Asia in the western United States and more frequent heat waves in the eastern U.S. are responsible for the persistence of smog in these regions over the past quarter century despite laws curtailing ...

Measuring ozone from space

Today is the UN's International Day for the Preservation of the Ozone Layer – the perfect opportunity to look at how and why measurements of this molecule are taken from space.

Climate change may extend ozone season in the Southeastern US

Extreme weather conditions associated with climate change may extend the ozone season in the Southeastern United States as drought-stressed trees emit more of the precursor compound that helps form the health-threatening ...

Mexico City businesses say smog alert cost $300 mn

Traffic bans imposed by Mexico City authorities to reverse an upsurge of smog have cost residents and small businesses more than $300 million since April, a trade association said Tuesday.

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