air pollution Flashcards
what is the atmosphere mostly comprised of?
Nitrogen (78.08%)
what does the atmosphere do?
Prevents UV radiation
redistributes water in hydrologic cycle
what are the 3 types of air tranport
global, regional, local
does air temperature increase or decrease with altitude?
decreases (the opposite of a fart)
what are primary air pollutants?
harmful substance emitted directly into the atmosphere
what are secondary pollutants?
harmful substance formed in the atmosphere reacts with a primary air pollutant
name 3 types of air pollutants
particulate material, nitrogen oxides, sulfur oxides, carbon oxides, lead, ozone
what is a particulate material
thousands of different solid or liquid particles suspended in air
what are nitrogen oxides?
nitrogen + oxygen at high temperatures (greenhouse gases) - causes airway restriction
what are sulfur oxides?
sulfur + oxygen - can impair ability of lungs to exchange gases
what are carbon oxides?
carbon monoxide (can cause headaches and even death) + carbon dioxide
does lead contribute to the global environmental risk?
yes, 11%
what are the 2 types of ozone
tropospheric (man made) and stratospheric (screens UV radiation in upper atmosphere - can cause burning eyes, chest discomfort and coughing
what is photochemical smog?
brownish-orange haze formed by chemical reactions involving sunlight, nitrogen oxide and hydrocarbons
what is the main source of outdoor air pollution?
transport (57%)