Air Pollution
Defined as a concentration of trace substances that occur at a higher level than in average air

AIR POLLUTION

• Comes from factories, powerplants, and motor vehicles
• 3 scales: global, local, and regional

GLOBAL SCALE

• Temperatures are going up globally
• Greenhouse effect
• If global warming goes too far, flooding of cities occurs
• Also precipitation patterns will change
• Ozone damage from CFCs

REGIONAL POLLUTION

• Damages vegetation through acid deposition
• Acid precipitation occurs when mixed with water
• Gets into soil and infects plants
• Effects aren't felt where emmited

LOCAL SCALE POLLUTION

• Mostly in urban concentrated areas
• Mainly carbon monoxide, hydrocarbons, and particulates
• Most polluted in US in california
• 10 most polluted cities in developing countries
• Changes in manufacturing processes are helping but more are driving

SOLID WASTE POLLUTION

• Sanitary landfill and hazardous waste
• Mainly paper products in USA
• Sanitary landfill is most common disposal strategy
• More than half of waste, trying to find alternatives

HAZARDOUS WASTE

• Contaminates ground water, and get in air
• Mining operations are largest polluters
• Difficult to get rid of

WATER POLLUTION

• In LDCs sewage gets into water sources
• Manufacturers pollute water when using it
• Point-source pollution and nonpoint-source pollution
• Point source from soecific place
• Nonpoint-source is from a wider area

NONPOINT-SOURCE POLLUTION

• Principal sources are agriculture
• Aral Sea is shrinking
• BOD water becomes oxygen starved and fish die
• Fish get infected
• Manufacturers warm the water which kills fish