Depletion

The current ozone hole area is still large compared to the 1980s, when the depletion of the ozone layer above Antarctica was first detected. This is because levels of ozone-depleting substances like chlorine and bromine remain high enough to produce significant ozone loss.

Unsustainable fishing on coral reef areas can lead to the depletion of key reef species in many locations.

The best refutation of the imaginary Malthusian laws of "land depletion" is the practice of Soviet collective farming.

He is keenly aware that the depletion of the Ogallala aquifer could ultimately drive his family off the land.

Crop rotation helps maintain soil fertility by preventing the depletion of specific nutrients.

The Great Northern 4-4-0s have all vanished, and there has been some depletion in the ranks of North British "Glens" and "Scotts."