Air pollution
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Air Pollution PowerPoint PPT Presentation


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Air Pollution. SVN3E. Burning fossil fuels creates not only greenhouse gases but also smog. Smog. Smog is mostly ground-level ozone (O 3 ), created when sunlight acts on methane and nitrogen oxide gases. Smog.

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Air Pollution

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Air pollution

Air Pollution

SVN3E


Air pollution

Burning fossil fuels creates not only greenhouse gases but also smog.

Smog


Air pollution

Smog is mostly ground-level ozone (O3), created when sunlight acts on methane and nitrogen oxide gases.

Smog


Air pollution

The other main ingredient in smog is fine-particulate matter such as aerosols, smoke, and dust.

Fine-particulate matter under an electron microscope

Smog


Air pollution

Fine-particulate matter is also known as PM2.5 because the particles are less than 2.5 mm (2.5 millionths of a metre) across.

Smog


Air quality index

In Ontario, the Air Quality Index (AQI) provides information about the level of smog in the air.

Air Quality Index


Air quality index1

When the AQI is predicted to be poor over a long period of time and over a wide area, the Ministry of the Environment will issue a Smog Alert

Air Quality Index


Air quality index2

When the AQI is predicted to be poor over a long period of time and over a wide area, the Ministry of the Environment will issue a Smog Alert, advising people to:

  • stay away from heavy traffic

  • remain indoors

  • avoid physical exercise

Air Quality Index


Effects of air pollution

Effects of air pollution include:

  • Irritated eyes, nose, and throat

  • Shortness of breath

  • Coughing

  • Headaches

Effects of Air Pollution


Effects of air pollution1

Air pollution can also cause or make worse:

  • asthma

  • chronic bronchitis

  • emphysema

  • pneumonia

  • lung cancer

Effects of Air Pollution


Respirators

Workers who have to be around air pollution should wear respirators, protective devices worn over the mouth and nose (and sometimes over the entire body).

Respirators


Respirators1

Workers who often require respirators include:

  • firefighters

  • construction workers

  • healthcare workers

Respirators


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