English ⇄ French

ecological balance
econ.	équilibre écologique
environ.	équilibre naturel
nat.res.	balance écologique
ecological balance The condition of equilibrium among the components of a natural community such that their relative numbers remain fairly constant and their ecosystem is stable. Gradual readjustments to the composition of a balanced community take place continually in response to natural ecological succession and to alterations in climatic and other influences
environ.	équilibre écologique

ecological balance: 3 phrases in 3 subjects

Environment	1
Life sciences	1
United Nations	1