the pressure caused by the weight of the atmosphere
an odorless very poisonous gas that is a product of incomplete combustion of carbon
Clean Air Act of 1970
The law that charged the Department of Transportation with the responsibility to reduce automobile emissions.
Clean Air Act of 1990
Policy added to the Clean Air Act of 1970 to reduce air pollution. This was provided to help reduce the safety hazards of unclean and unchecked air in a population.
the weather in some location averaged over some long period of time
forms when cold air moves under warm air which is less dense and pushes air up (produces thunderstorms heavy rain or snow
less dense warm air rises and creates vertical currents- as it rises into areas of lower atmospheric pressure it expands and cools, once it cools it descends and becomes denser and replaces the rising warm air
The way Earth's rotation makes winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left.
lower temperatures, clear skies, very small amount of precipitation
smog from industrial pollution and fossil fuel combustion, ex beijing gray air smog
thin strip of metal used to separate lines of type in printing
brings wet, warmer temperatures, high cloud cover, high winds
a highly poisonous brown gas (NO2)
a layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
a small discrete mass of solid or liquid matter that remains individually dispersed in gas or liquid emissions (usually considered to be an atmospheric pollutant)
the brown haze that develops in sunny cities. it is formed by the action of sunlight on pollutants such as hydrocarbons and nurtogen oxides. these chemicals react to form a brownish muzture of ozone and other pollutants.
pollutants that are put directly into the air by human or natural activity.
the ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperature
pollutants that form from chemical reactions that occur when primary pollutants come in contact with other primary pollutants or with naturally occuring substances, such as water vapor.
devices containing alkaline substances that precipitate out much of the sulfur dioxide from industrial plants.
the atmospheric layer between the troposphere and the mesosphere
a colorless toxic gas (SO2) that occurs in the gases from volcanoes
The temperature inversion in which warm air traps cold air and pollutants near the earth.
the layer closest to Earth, where almost all weather occurs; the thinnest layer
Secondary, formed from N oxides and volatile hydrocarbons, photochemical smog, forest decline, reduces air visibility & health problems
Volative Organic Compounds (VOCs)
Carbon containing chemicals used in and emitted by vehicle engines and a wide cariety of solvents and industrial processes as well as by many household chemicals and consumer items.
a front where warm air moves over cold air and brings drizzly rain and then are followed by warm and clear weather, the front of an advancing mass of warmer air
the meteorological conditions: temperature and wind and clouds and precipitation