How does de-icing roads with salt negatively impact the environment?
a. the road salt attracts deer that are then hit by motor vehicles.
b. it removes necessary salt from the local water courses.
c. the high salinity of the surface runoff is harmful to freshwater ecosystems.
d. the salt harbors salt eating bacteria that are toxic to animals. select the best answer from the choices provided a b c d

Answer;

C. The high salinity of the surface runoff is harmful to freshwater ecosystems.

Explanation;

-De-icing roads with salt negatively impact the environment, such that water supplies contaminated by road salt stop supporting certain types of aquatic life. This happens when salt comes in contact with the upper layers of a water source. Due to the presence of snow salt, the water becomes more dense and sinks to the bottom, preventing oxygen in the top layers from reaching the bottom layers. This separation of upper and lower layers disrupts aquatic ecosystems.

-Salt can also: Damage plant foliage , inhibit plants’ nutrient intake , kill certain plants , cause salt-resistant species to proliferate, which diminishes plant diversity and further disrupts ecosystems.

and after water is usually warmed by the sun the water temperature raises and then evaporates .