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Public Health

Public Health, environment, exam 2

archaelogical evidence of city planning 2000 BC
USA awareness of environment 1960s
1286 toxic waste dumps identified 1970s
1000-1600/year toxic chemicals created in USA
types of pollution air, water, soil, sewage handling
air pollution temp. inversion, global warming, smog, acid rain, ozone depletion, primary & secondary pollutants, biological/health effects
30,000 die/day/world due to lack of clean water
3 major aspects pollution, handling of sewage, purification of water
soil pollution solid waste & disposal methods
Manimata disease Japan - linked to mercury
soil pollution leads to mutagenic effects, carinogenic effects, birth defects, still births
1986 Chernobyl worst nuclear accident
NRC nuclear regulatory commission
1970 EPA created
stratosphere protects us from ultraviolet light
ozone layer stratosphere
troposphere nitrogen, oxygen, water vapor, carbon dioxide, argon
gases in normal air nitrogen, oxygen, argon, carbon dioxide, neon, helium, methane, nitrous oxide, hydrogen, xenon, nitrogen dioxide, ozone
Polluting gases which are completely absent from normal atmosphere nitric oxide, carbon monoxide, sulfur dioxide, sulfur trioxide
polluting gases present in normal atmosphe, but quantities are very low nitrogen dioxide, nitrous oxide, ozone
direct correlation btwn. CO2 and temperature
primary pollutants CO, CO2, SO2, NO
primary pollutants most hydrocarbons (HCs)
primary pollutants most suspended particulate matter (SPM)
secondary pollutants HNO3, H2SO4
secondary pollutants NO2, SO3, H2O2, 03, PANs
secondary pollutants most NO3- & SO4 2- salts
Peracetonitryls PANS
primary pollutants converted to secondary pollutants by light
secondary pollutants erode lining of repiratory tract
Created by: JYarger