Which phrase best describes a point source of air pollution?

O

A. Smokestack releasing dioxins from a plastics factory

O

B. Automobiles releasing sulfur dioxide throughout a city

O

C. Fertilized lawns causing nutrient runoff into a river

O

D. Pipes releasing wastewater from an industrial area

A: smokestack releasing dioxins from a plastic factory

Explanation:

hope this helps:)

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

answercontent filtering;