air pollution and diseases. Flashcards
air pollution
the release of chemicals and particulates (in gaseous or dust form) into the atmosphere.
particulate matter (pm)
: a mixture of solid particles and liquid droplets found in the air. It is divided into different categories based on size.
what are the catergories in PM
- coarse particle (PM 10)
- Fine particles (PM 2.5)
- Ultrafine particles (PM 0.1)
less than 2.5 micrometers such as vehicle exhaust, wildfires, power plant emissions are examples of
fine particles pm 2.5
between 10 and 2.5 micrometers
such as : mold spores, pollen, dust, soot/fly ash, plant and insect parts are examples of
coarse particles pm10
what is absolutely necesary for life?
air
how long can a man lbe deprived with out air?
3 mins
what are the main functions of air?
- interchange of gases in respiration
2. regulation of body temperature.
air maily consist of
78% nitrogen
21% oxygen
other gases present in small quantities in air are?
are argon, carbon dioxide, watery vapour or aqueous vapour, methane, neon and other gases.
The combined effects from ambient (outdoor) air pollution and indoor air pollution cause approximately_______ premature deaths every year, largely as a result of increased mortality from stroke, IHD, COPD, lung cancer and acute respiratory infections.
7 million
air pollution can occur in both
out door and indoor environments
what are common sources of air pollution?
Household cooking, industries, motor vehicles, incinerators and forest fires are common sources of air pollution.
Air pollution originates from numerous sources of emission, both
natural and man-made
air pollution becomme more dominant since the beginning of ______.
industrialization.