Biology Forums - Study Force

Transportation-produced smog causes air to turn
  a. gray.
  b. black.
  c. brown.
  d. red.
  e. blue.

Question 2

Air pollution may cause
  a. lung damage.
  b. DNA mutations.
  c. skin cancer.
  d. burning eyes.
  e. all of these.

Answer to q. 1

C

Answer to q. 2

E

All correct!