What is ecology  [videorecording] 

 - Chicago :  Encyclopaedia Britannica Educational Corporation,  1977 
 - 1 videocassette (U-matic) (18 min.) :  sd., col. ;  3/4 in. 
<br/><br/> Outstanding photography of natural life helps define and illustrate basic terms in the science of ecology. The variety and complexity of plant and animal relationship - a dependance for survival - are explored through several major biomes: forest, desert, seashore, urban, and agricultural. It also considers how human activity presents a constant danger to ecological balance 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology