1. REVIEW the vocabulary.
2. LISTEN to the audio.
3. ANSWER the questions.
4. CHECK your answers (Show Answers)

• aerobic [adj] - exercise requiring oxygen
• laps [n] - swimming the length of a pool one time
• urine [n] - liquid human waste (pee)
• artificial sweetener [n] - a manmade sugar substitute
• recreational waters [n] - pools, hot tubs
• human waste [n] - human urine (pee) and feces (shit)
• one part per trillion [exp] - 1 in 1,000,000,000,000
• taboo [adj] - an uncomfortable of forbidden subject
• concentration [n] - percentage of volume
• diluted [adj] - made thinner or weaker by adding water
• quantify [v] - measure
• implications [n] - effects
• sterile [adj] - clean / no bacteria
• inherent [adj] - existing in something
• compound [n] - made of several elements
• disinfection [n] - remove bacteria
• chlorine [n] - a chemical used to clean pools
• byproducts [n] - secondary product
• volatile [adj] - a substance that changes quickly (dangerously)
• irritation [n] - pain / discomfort
• asthma [n] - a lung condition making breathing difficult
• bottom line [n] - conclusion
• reiterate [v] - restate / say again
• outweigh [v] - be more important than

[n] - noun,  [v] - verb,  [adj] - adjective,  [exp] - expression

1. What type of exercise is swimming?
   aerobic
   anaerobic
   unhealthy
   
   
2. How many people admit to peeing in public pools?
   about 1 in 5
   about 20
   about 5%
   
   
3. How did they measure amount of urine in water?
   They compared the concentration to rivers and lakes.
   They measure the concentration of artificial sweeteners in pools.
   They measured the amount of human waste in pools.
   
   
4. How many liters of urine were in the larger pool?
   30 liters
   75 liters
   840 000 liters
   
   
5. How does she describe the amount of urine in pools?
   quite dangerous
   very high
   quite low
   
   
6. Hot tubs had a ______ concentration of urine than/to pools.
   higher
   similar
   lower
   
   
7. Lindsay describes urine (by itself) as ______.
   a big concern
   a little risky
   sterile
   
   
8. Urine can react with ______ to form a disinfection byproducts.
   chlorine
   compound
   trichloramine
   
   
9. Trichloramine in pools ____ the cause of eye irritation.
   is
   may be
   isn't
   
   
10. Long-term exposure to trichloramine is linked to ____.
    eye irritation
    a type of asthma
    cancer
    
    
11. She advises people ____.
    to keep swimming to stay healthy
    to avoid public pools
    to wear eye protection is pools.
    
    
12. She states occasional swimming in public pools _____ lead to health problems.
    will
    might
    will not