Air Quality

[3] facts about photochemical smog.

- it's caused by the action of sunlight on chemicals - it forms ozone, which harms living things - it is a mixture of ozone and other air pollutants

[3] facts about the causes of air pollution.

- some air pollution occurs naturally - some air pollution is caused by human activity - motor vehicles cause almost half of the air pollution from human activities

What is a result of air pollution?

acid rain

Define pollutants.

harmful substances in the air, water, or soil.

How can air pollution affect human health?

it can cause asthma, lung damage, respiratory illnesses, and irritation to the nose, throat, and eyes.

What effects does ozone have on people?

it can irritate people's eyes, throats, and lungs.

How has air quality changed in the past 30 years?

it has generally improved

How can acid rain harm lakes and ponds?

it makes them acidic to the point that plants, amphibians, fish, and insects can no longer survive in it.

What is a naturally acidic?

rain

Define acid rain.

rain that contains more acid than normal.

Define photochemical smog.

the brown haze that forms over sunny cities

What is the cause of sulfur oxide?

the burning of high sulfur coal

How can sulfuric acid be both a result and a cause?

the forming of acid rain

What are some natural sources of particles in the atmosphere?

volcanoes, smog, dust, pollen, forest fires, and dust storms.

Is the air in many American cites still polluted?

yes, the air in many cities is still polluted