also: オゾン・ホール
noun
ozone hole
Refers to the seasonal thinning of the ozone layer, especially over Antarctica. Common in environmental and scientific contexts.
南極上空のオゾンホールが今年も観測された。
An ozone hole was observed again this year over Antarctica.
オゾンホールの拡大は地球環境にとっ
The expansion of the ozone hole is a serious problem for the global environment.