Question

1. which of the following is a source of nonpoint pollution? *

a. unlined landfill
b. polluted waste water from a chemical plant
c. leaking oil tanker
d. runoff from agricultural fertilizer

1. parasitic worms would be classified as which type of water pollutant? * 2 points

a. pathogen
b. organic matter
c. inorganic chemicals
d. heavy metals

1. an inexpensive solution to providing more fresh water is * 2 points

a. desalination.
b. drilling more wells into aquifers.
c. water conservation.
d. building more dams.

Explanation:

Question 15

• A source of non - point pollution is runoff from agricultural fertilizers. Non - point source pollution comes from diffuse sources (like fields), while point sources (e.g., chemical plant waste water, leaking oil tanker, unlined landfill) have a single identifiable source.

Question 16

• Parasitic worms are classified as pathogens. Pathogens are disease - causing agents. Organic matter is decomposed material, inorganic chemicals are non - carbon - based chemicals (e.g., salts), and heavy metals are metallic elements (e.g., lead, mercury).

Question 17

• An inexpensive solution to providing more fresh water is water conservation. Desalination is costly, drilling more wells can lead to aquifer depletion and is not always inexpensive, and building more dams is expensive and has environmental impacts.

Answer:

1. d. runoff from agricultural fertilizers
2. a. pathogen
3. c. water conservation