Describe the main ways the urban environment pollutes our water ...

[sheilaspns]

Describe the main ways the urban environment pollutes our water supply.
 
  What will be an ideal response?

Question 2

Scientists can measure water pollution with all sorts of devices. How can we estimate the degree of water pollution by
  looking at macroinvertebrates in the water?

 
  What will be an ideal response?

[babybsemail]

Answer to Question 1

The urban environment pollutes our water supply from sewage disposal systems, chemical runoff, roadway runoff,
surface runoff, and seepage from municipal landfills

Answer to Question 2

Certain macroinvertebrates cannot survive in polluted water. Other species thrive in polluted water. If you sample
the macroinvertebrates in a body of water and find mostly pollution-intolerant species, the water is probably pretty
clean. If only pollution-tolerant species are present, the water is likely very polluted.

[sheilaspns]

Excellent

[isabelt_18]

Thanks for the timely response, appreciate it