depletion
n.the act of using up a supply of something until there is very little or none left. It is often used when talking about natural resources like water or energy.
n.the reduction in the number or quantity of something; the act of exhausting a resource or supply.
“The depletion of the ozone layer is a serious environmental concern.”
“Farmers are worried about the rapid depletion of groundwater during the long summer drought.”
“Economists argue that the rapid depletion of non-renewable resources will eventually force a global shift toward sustainable energy alternatives to prevent a total industrial collapse.”
Often followed by the preposition 'of' to indicate the resource being exhausted.
“Worldwide, some of the most widespread and damaging drought events in recorded history have occurred in recent years due to climate change and resource depletion.”
Borrowed from Latin depletio, depletionem, from depleō.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.