5. which of the following types of pollution cannot be attributed to car and truck emissions?
a. acid rain b. sedimentation c. ozone d. photochemical smog i think it is ozone.

How might the effects of el niño impact forests in the united states? a) it could cause hurricanes that would destroy forests in oregon. b) it could cause droughts which would make forest fires more likely. c) it could cause an increase in mold that could kill large amounts of trees. d) it could cause an increase in the length of the wet, rainy seasons in the northwest.