History

Question 1

industrial rev

Answer 1

mjr relocation o pops fr/ country agri­‐based to industrial town/city based

• open sewer» rivers= main drinking source
• rapid pop^ w/ no means (concept?) of sanitation
• Joseph Bazalgette= designer of undrgrd sewers
• Romans also had sewers

Question 2

1960s+ 80s

Answer 2

pollution from insecti/ herbi- sides

-many toxic chems banned/ controlled

Question 3

21st c

Answer 3

-pollution of waterways still ^» antibiotics+ chems contly found (hu. hormones)=> fish sex changes

Question 4

Public Hlth +water quality

Answer 4

can look clean while still contaminated

-can screen for indicator strains (e.g. Coliforms)