Unit 7

A naturally occurring compound that is used as a preservative and as an adhesive in plywood and carpeting.

The process of converting from liquid to a gas or vapor.

Reduced visibility.

Unwanted sound that interferes with normal activities that is loud enough to cause health issues including hearing loss.

A type of air pollution that is a mixture of oxidants and particulate matter.

A device that uses chemicals to convert pollutants such as nitrogen oxide and carbon monoxide to nitrogen gas and carbon dioxide.

A device that prevents VOCs from escaping into the atmosphere while a person is fueling their vehicle.

Compounds that adversely affect the quality of air in buildings and structures.

A substance that contributes hydroxide ions to a solution.

Smog dominated by sulfur sulfur dioxide, sulfate compounds, and particulate matter.

The relative strength of acids and bases in a substance. It is a logarithmic scale, meaning that each number on the scale represents a change by a factor of 10.

Particles smaller than 10 μm are called Particulate Matter-10 and are not filtered out by the nose and throat and can be deposited deep within the respiratory tract.

A radioactive gas that occurs naturally from the decay of uranium and is an indoor air pollutant.

Precipitation high in sulfuric acid and nitric acid.

A class of air pollutants formed as a result of sunlight acting on compounds such as nitrogen oxides and sulfur dioxide.

A polluting compound that comes directly out of a smokestack, exhaust pipe, or natural emission source.

Particles of size 2.5 μm and smaller can travel further within respiratory tract and are of even greater health concern.

The process of converting from a solid to a gas or vapor.

A trace metal that occurs naturally in rocks and soils, is present in small concentrations in coal and oil and is a neurotoxin.

A buildup of toxic pollutants in weatherized spaces, such as newer buildings in the developed world.

A corrosive gas that comes primarily from combustion of fuels such as coal and oil, including diesel fuel from trucks.

An atmospheric condition in which a relatively warm layer of air at mid-altitude covers a layer of cold, dense air below.

A long, thin, fibrous silicate mineral with insulating properties, which can cause cancer when inhaled.

Smog that is dominated by oxidants such as ozone.