1. In what way are chemicals not harmful to human health?
(a) They can change our genetic structure.
(b) They can be developed to have a positive environmental effect.
(c) They can weaken the immune system.
(d) They can be cancer-causing.

2. Why is goat hair a good material for the Bedouin tents?
(a) Because Bedouins have a constant source of this environmentally friendly material.
(b) Because Bedouins like tents that are heavy.
(c) Because Bedouins hate goats.
(d) Because goat hair is a good insulator but hard to find.

3. Why would designers create products that wear out in a certain amount of time?
(a) So that consumers would have to continue to purchase new products.
(b) So that they did not have to close factories.
(c) So that landfills did not get too full.
(d) So that factories never had to change products.

4. How do products with toxic materials end up getting sold to consumers in the United States?
(a) Companies in the United States do not sell products with toxic chemicals.
(b) Parts of products that contain toxic materials are not removed by the government.
(c) Companies purchase products abroad, import them, and resell them in the United States.
(d) Components of products that contain toxic chemicals can be imported into the United States.

5. Which statement is NOT an example of recycling as we know it?
(a) Making new backpacks out of old milk cartons.
(b) Converting old books to new printer paper.
(c) Collecting rain water for household use.
(d) Melting old soda bottles to make new carpet.