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6-N.I.M.B.Y. – There is No Away in Throwing
• CFC’s break down the ozone layer– Why is this a problem?
Pollution in Surface Waters
• Methods for killing viruses and bacteria in polluted water.– Chlorinating water (may cause cancer-causing
agents)– High-intensity ultraviolet light
Pollution in Ground Water
• Pollution from farmers seeps into soil and contaminates ground water.
• Contaminates aquifers
• Biodegradable substances – organic substances broken down by bacteria, fungi, or other organisms.
• Table 3.6• Are all substancesbiodegradable if theysay they are?
Hazardous Wastes
• Hazardous household wastes• Table 3.7
4 R’s
• Reduce, Reuse, Recycle, Recover– These R’s are ranked from best strategy to worst.
Sanitary Landfills
• Covered to avoid windblown litter and attract scavengers.
• Consist of mostly organic materials
• Produces high amounts of leachate (a liquid that results from decomposition– Filtered out and sent to water treatment centers
• Anaerobic conditions produce methane and carbon dioxide.– Methane burned off in a controlled manner to
prevent explosions.
Secure Landfills
• Landfills that are covered once they are full and have wells drilled in them so they can be monitored for leakage from the site
• Store hazardous and toxic wastes.
• Bioremediation – removal of contaminants from the soil by living things.– Eg. Sunflowers break down radiation into non-
harmful chemicals and deposit them in the soil.
• Pg. 252 #1-5
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