Ozone depletion

Image of the largest Antarctic ozone hole ever recorded (September 2006), over the Southern pole

Layers of the atmosphere (not to scale). The Earth's ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to 19 mi) above Earth.

Global monthly average total ozone amount.

Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% in the total amount of ozone in Earth's stratosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar regions. The latter phenomenon is referred to as the ozone hole. In addition to these well-known stratospheric phenomena, there are also springtime polar tropospheric ozone depletion events.

单词	Ozone Depleting Substance
释义	Ozone Depleting Substance 原声例句 Vox 观点 It listed control measures to reduce ozone depleting substances in a series of steps. 它列出了一系列步骤中减少消耗臭氧层物质的控制措施。英语百科 Ozone depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% in the total amount of ozone in Earth's stratosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar regions. The latter phenomenon is referred to as the ozone hole. In addition to these well-known stratospheric phenomena, there are also springtime polar tropospheric ozone depletion events.
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Ozone Depleting Substance

Ozone depletion