2. Why can't many materials be recycled?
(a) Because consumers are not committed to recycling.
(b) Because the technology doesn´t exist.
(c) Because they are materials that are too solid to be melted down.
(d) Because they are hybrids of too many other materials.

3. What aspect of a roof is not desirable to human health?
(a) It wears rapidly and be frequently replaced.
(b) It creates radiation energy.
(c) It is slippery and causes many accidents.
(d) It can off-gas chemicals that are toxic.

4. Which of the following statements best describes natural systems?
(a) Natural systems take things from the environment but always give back.
(b) Natural systems always go through a series of devolutions.
(c) Natural systems cannot recycle nutrients or materials.
(d) Natural systems waste more energy than industrial systems.

5. In the authors' opinion, what should factories do?
(a) Help people, nourish the environment, and produce good materials.
(b) Help reduce consumption of resources no matter what the effect on profits.
(c) Help consumers save money and produce efficient energy.
(d) Help industry implement new technology.

6. Why aren't cherry trees wasteful?
(a) All of the leaves are eaten by herbivores every autumn.
(b) They do not require many resources to live.
(c) All of their blossoms are decomposed when they are spent and fall to the ground.
(d) They create many blossoms that do not produce fruit.

7. What is inspiring about cherry trees to the authors?
(a) They are wasteful.
(b) They do not need many resources to live.
(c) They reduce the amount of oxygen in the environment.
(d) They are beautiful and productive at the same time.

8. All of the following are true about a typical book except:
(a) The inks contain many toxic chemicals.
(b) It uses chlorine in all aspects of its production.
(c) It is easily recycled.
(d) It is not biodegradable.

9. How should homes meet heating, cooling, and power needs?
(a) By consuming fossil fuels.
(b) By being part of the power grid.
(c) By being integrated into the larger environment.
(d) By using natural resources like wood.

10. All of the following are examples of local insulation and cooling systems, except:
(a) Chinese homes are dug into the ground.
(b) Iranian wind towers drip water onto vents that bring in the cooled air.
(c) "Wind scoops" bring cool air down a chimney in Pakistani homes.
(d) Energy efficient air conditioners are made a small size to fit family homes.

11. Which statement below would be a good title for this section of the book?
(a) How to make successful designs for the Earth and its people.
(b) How to make more efficient energy.
(c) How to use the environment for the benefit of business.
(d) How to employ happy workers.

12. How are most manufacturing processes different than the way ants live in the environment?
(a) Most manufacturing is concerned with productivity.
(b) Most manufacturing replaces the resources it depletes.
(c) Most manufacturing produces biodegradable chemicals.
(d) Most manufacturing creates waste that is not useful in the environment.

13. The authors present the cherry tree as a good model of what?
(a) Eco-efficiency.
(b) Crude product design.
(c) Cradle to cradle design.
(d) Cradle to grave design.

14. How does the Menominee tribe use their forest resources?
(a) They take only half of the trees at a time.
(b) They sell a certain number of trees to maintain the rest of the forest.
(c) They don't collect any trees for any reason.
(d) They collect only the weak or sick trees, leaving the healthy trees to grow.

15. What is true about the inks typically used for printing books?
(a) They can easily be made from other recycled products.
(b) They release toxic chemicals as they break down.
(c) They are non-toxic and washable.
(d) They are never truly permanent.