conservation

definition: 
The action of conserving something, in particular: preservation of the natural environment and of wildlife or prevention of wasteful use of a resource
sentence: 
Broader efforts to cut back sprawl and promote energy conservation are just as important as personal economies.
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
adjective: 
adverb sentence: 
adjective sentence: 
verb: 
conserve
verb sentence: 
Industry should conserve more water