9.2

SmogHeat Island Effect

NoiseLights

Smog

• Dirty clouds of pollution

Industrial Smog

• Power plants that burn coal and oil• Sulfur dioxide (SO2)

Photochemical Smog

• Burning gasoline• Nitrogen oxides (Nox), ozone, PAN• React with sun

Ozone

• Ground level• Irritate and

damage lungs• Difficulty breathing • Make asthma

symptoms worse

PAN

• Peroxyacetyl nitrates• Respiratory and eye irritants• Cause cancer• Kill plants

Ozone Levels

• Monitored everyday• Warnings on high days

http://www.epa.state.il.us/air/aqi/

Atmospheric Ozone

• Good• Protects earth• Radiation

Catalytic Converters

• Eliminates car emissions• Carbon monoxide (deadly) • Nitrogen (make smog and acid rain; unhealthy)• Hydrocarbons (generate ozone and smog)

Urban Heat Island Effect

• City is hotter than rural neighbors• More dark surfaces to absorb / maintain heat• More machines, air conditioners, heaters

Solutions to Heat Island

1. More plants and trees2. More light surfaces

Noise Pollution

• Distracting, irritating, or damaging sounds• Airplanes, trains• Construction• Loud music

Decibel (dB)

• Measures sound• 120 dB can cause

deafness

Light Pollution

• City lights on all night• Harms nocturnal animals• Can’t see stars