CH 15: Air pollutants are found throughout the entire global system

What did Chattanooga do to address their pollution problem?

[blank_start]Air pollution[blank_end] is defined as the introduction of [blank_start]chemicals[blank_end], particulate matter or microorganisms into the atmosphere at concentrations high enough to harm plants, [blank_start]animals[blank_end], and [blank_start]material[blank_end]s such as buildings, or to alter [blank_start]ecosystems[blank_end]

Air pollution can occur naturally or anthropogenically

Which of the following is a natural cause of air pollution?

Which of the following is an example of anthropogenic air pollution?

In general, the air is [blank_start]much cleaner[blank_end] than it was 40 years ago.

Recently, which of the following have had the worst outdoor air quality issue?

Which of the following have indoor air pollution as a human health issue?

Even though air pollution has been with us for millenia, both the definition of pollution and the classification of a subtance as a pollutant are still in transition.

The science of air pollution is closely intertwined with

The US Clean Air Act was enacted in [blank_start]1970[blank_end]

The US Clean Air Act identified [blank_start]six[blank_end] pollutants that significantly threaten human well-being, ecosystems and/or structures

The six pollutants identified by the Clean Air Act of 1970 included

Although not stated in the Clean Air Act, volatile organic compounds and sulfur dioxins are commonly measured air pollutants that have the potential to be harmful

Sulfur dioxide is a [blank_start]corrosive[blank_end] gas that comes primarily from combustion of fuels such as [blank_start]coal and oil.[blank_end]

Sulfur dioxide is released by

The atmosphere is __ percent nitrogen gas.

Gasoline-powered vehicles give off more particulate matter, in the form of black smoke, than diesel-powered vehicles.

Particulate matter ranges in size from [blank_start]0.01[blank_end] micrometers to [blank_start]100[blank_end] micrometers

Particulate matter larger than [blank_start]10[blank_end] micrometers is usually filtered out by the noise and throat and is not regulated by the EPA.

blank are of concern to air pollution scientists because they are not filtered out by the nose and throat and can be deposited deep inside the respiratory tract.

The most harmful particles are