Ozone depletion | Facts, Effects, & Solutions | Britannica
ozone depletion, gradual thinning of Earth’s ozone layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The thinning is most pronounced in the polar regions, especially over Antarctica.
Information on Ozone and Ozone Depletion | US EPA
2024年1月9日 · Learn about the consequences of ozone depletion and UV-B for human health and the environment. Ozone-Depleting Substances. See a list of chemicals categorized as ozone-depleting substances (ODS) under the Montreal Protocol. Current State of the Ozone Layer. Learn about the recovery of the ozone layer.
Ozone depletion - Wikipedia
Ozone can be destroyed by a number of free radical catalysts; the most important are the hydroxyl radical (OH·), nitric oxide radical (NO·), chlorine radical (Cl·) and bromine radical (Br·). The dot is a notation to indicate that each species has …
Basic Ozone Layer Science - US EPA
2024年9月17日 · Learn about the ozone layer and how human activities deplete it. This page provides information on the chemical processes that lead to ozone layer depletion, and scientists' efforts to understand them.
Health and Environmental Effects of Ozone Layer Depletion
2024年7月16日 · Ozone layer depletion increases the amount of UVB that reaches the Earth’s surface. Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development.
What is the ozone layer, and why is it important?
2023年3月13日 · One of the most pressing environmental problems over the last century has been the depletion of the ozone layer. But what is the ozone layer, and why does it matter? Ozone is a gas present naturally within Earth’s atmosphere. It is formed of three oxygen atoms (giving it the chemical formula O3).
Ozone layer facts and information - National Geographic
2023年1月10日 · Climate 101: Ozone Depletion The ozone layer helps to protect life from harmful ultraviolet radiation. Find out what caused the ozone hole, and how the 1989 Montreal Protocol sought...
Science - Ozone Basics - National Oceanic and Atmospheric …
Over some parts of Antarctica, up to 60% of the total overhead amount of ozone (known as the column ozone) is depleted during Antarctic spring (September-November). This phenomenon is known as the Antarctic ozone hole.
Science: Ozone Depletion - National Oceanic and Atmospheric …
The chlorine and bromine in human-produced chemicals such as the ones known as chlorofluorocarbons (CFCs) and halons are depleting ozone in the stratosphere. The figure shows a simplified cycle of reactions in which chlorine (Cl) destroys ozone (O3).
Scientific Assessment of Ozone Depletion: 2022 - National …
The questions and answers address the nature of atmospheric ozone, the chemicals that cause ozone depletion, how global and polar ozone depletion occur, the extent of ozone depletion, the success of the Montreal Protocol, the possible future of the ozone layer, and the protection against climate change now provided by the Kigali Amendment.