Work cat.: 94-27799: Johnson, D.L. Land degradation, 1995 (... a decline in natural, biological productivity that is either irreversible or which may not be recovered for at least one human generation)

Envt. devel. terms: #3484.

LC database, 7/7/94.

Dict. env. sci. tech.; Dict. eco. env. sci.; Green encyc.; AP dict. sci. tech.; Van Norstrand sci. encyc.