1/21/99

Public Health

 

Sound Pollution

decibel-unit of measuring sound intensity

-150-120 dbA--causes pain to rupturing the ear drum at close ranges

-can be an occupational hazard

-110-110 causes serious damage in 8 hrs

-90--hearing damage in 8 hrs, speech interference

-70--annoying

 

Hearing specialist and ear surgeon explains that in addition to causing psychic shock, sudden noise automatically constricts blood vessel, dilate pupils, tenses muscles, increases the heartbeat, and causes wincing, holding of breath, and stomach spasms.--heart disease

 

Solid Waste

handout 12

handout 11

 

 

Hazardous Waste

handout 12

handout 14

midnight dumping--illegal dumping of hazardous waste by companies

 

Water Pollution

Table 26.1

biological oxygen demand (BOD)

Table 26.2

human pathogens transmitted in water

-water supply is not safe, many organisms are found in the water

-ground water is also polluted--#2 source

-surface water (lakes, rivers) #1 source of drinking water

-agricultural use of water

-heated water as a pollutant--coolant by industry

-organic chemicals--pesticides and insecticides

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