PROBLEM 4. Why We Must Practice Conservation 409 



4. Factories and large cities interfere with normal plant-animal relation- 

 ships with the environment. List some of the wavs in which such inter- 

 ference may take place. How may man protect the living things that are 

 harmed by cities and factories? How may he protect himself? 



5. The class may be divided into committees to review this problem. 

 Each committee may take one of the following topics and prepare a 

 committee report: (a.) The importance of forests to us. (b.) How forests 

 are destroyed. Methods of fire prevention and fire fighting could well be 

 included, (c.) The causes of our.soil problem. Soil conservation practices 

 could ^^'ell be included, {d.) The vanishing of wildlife and its conser- 

 vation. 



Further Activities in Biology 



1. Read Pack and Gill's Forest Facts. Tell the class the facts of forest 

 destruction. 



2. How could you demonstrate that a spongy forest floor prevents 

 water from running off rapidly? Present it to the class. Does it convince 

 your classmates? 



3. Have there been forest fires near where you live? Can you find out 

 how they started? Who fought them? 



4. Read Paul Sears's Deserts on the March. Present a book report to the 

 class. 



5. If you are interested in the work of the forester or forest ranger find 

 out where you could prepare yourself for this profession, what the re- 

 quirements are, and so on. Report to the class. 



6. D. C. Peattie has written a most interesting life of Audubon. Read it. 



7. Your state agricultural station may be able to supply information 

 about reforestation. If you live where such work is possible some of your 

 classmates and you might undertake a tree-planting project. 



8. Can you visit a bird refuge? Report on the bird refuges in your state. 



9. Report on any movie you have seen or any broadcast you have 

 heard on the subject of wildlife extermination or conservation. 



In UNIT VIII yon ivill consider these problems: 



Problem i. Flow Do the Simple Animals and Plants 

 Reproduce? 



Problem 2. How Do the More Complex Animals Reproduce? 



Problem 3. Ho\\' Do the More Complex Plants Reproduce? 



