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Smog

Topic

Technically, it's volatile organic compounds and nitrogen oxides in the presence of sunlight, which result in the production of ozone.

Skip next section Reports & Analysis

Reports & Analysis

Students on their way to school on a cold and smoggy winter morning

India: What's being done to clean up Delhi's toxic air?

India: What's being done to clean up Delhi's toxic air?

The winter air quality in New Delhi and other Indian cities dips to hazardous levels every year.
Nature and EnvironmentNovember 24, 2022
People walk along a road near New Delhi's India Gate, which is obscured by smog.

Smog forces school closures in New Delhi

Smog forces school closures in New Delhi

Hazardous levels of smog have prompted school closures and calls to work from home or carpool.
HealthNovember 5, 202201:39 min
Commuters drive their vehicles amid heavy smog conditions in Lahore

Pakistan: How Lahore's smog is harming residents

Pakistan: How Lahore's smog is harming residents

People in Pakistan's second-largest city are devising novel ways to tackle pollution.
Nature and EnvironmentDecember 7, 2021
A man walks along a road on a smoggy morning in New Delhi, India

India struggles to move on from coal

India struggles to move on from coal

Choked in toxic smog, New Delhi has partly shut down. But replacing coal will be difficult for India's booming economy.
Nature and EnvironmentNovember 16, 2021
Air pollution in Delhi, India

Can smog towers solve Delhi's air pollution problem?

Can smog towers solve Delhi's air pollution problem?

Air pollution kills more than 7 million people worldwide every year. And right at the top of the list of places with unhealthy air is Delhi, also known as "the smog capital of the world." Gigantic smog-sucking towers that clean the air are now being hailed as a new solution. But they are far from a fix-all.
Nature and EnvironmentNovember 5, 202007:05 min
Hay bales in front of a city landscape.

Cleaner cities, cleaner crops

Cleaner cities, cleaner crops

The benefits of city trees, the dangers of ozone for growing crops, and Europe's largest urban farm.
Nature and EnvironmentAugust 6, 202030:00 min
Skip next section Opinion

Opinion

Nils Zimmermann Kommentarbild App

China's coal addiction

Nils Zimmermann
Commentary
December 11, 2015