How does population growth negatively impact water quality?
a. altering of wetlands
b. underground water supply is increased
c. decreased sedimentation in rivers and streams
d. more water is chemically treated for drinking

Population growth negatively impact water quality is the altering of wetlands. The answer is letter A. This may be due to the construction of buildings for business or industries and houses for the continuous growth of human. 

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects