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  2. International Day for the Preservation of the Ozone Layer

    en.wikipedia.org/wiki/International_Day_for_the...

    The United Nations designates a specific theme each year for the International Day for the Preservation of the Ozone Layer to highlight different facets of ozone protection. 2015: 30 Years of Healing the Ozone Together. [6] 2016: Ozone and climate: Restored by a world united. [7] 2017: Caring for all life under the sun. [8] 2018: Keep Cool and ...

  3. File:Ozone cycle.svg - Wikipedia

    en.wikipedia.org/wiki/File:Ozone_cycle.svg

    Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

  4. File:Untitled, 2020, charcoal on canvas, 190x260cm.jpg ...

    en.wikipedia.org/wiki/File:Untitled,_2020...

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  5. Vienna Convention for the Protection of the Ozone Layer

    en.wikipedia.org/wiki/Vienna_Convention_for_the...

    The Indian Minister of State for Environment, Forest and Climate Change, Shri Prakash Javadekar, addressing at the 21st International Day for the preservation of the ozone layer and the 30th anniversary of the Vienna Convention for the Protection of the Ozone layer, in New Delhi on 16 September 2015.

  6. Canvas - Wikipedia

    en.wikipedia.org/wiki/Canvas

    Splined canvas can be restretched by adjusting the spline. Stapled canvases stay stretched tighter over a longer period of time, but are more difficult to re-stretch when the need arises. Canvas boards are made of canvas stretched over and glued to a cardboard backing, and sealed on the backside. The canvas is typically linen primed for a ...

  7. Montreal Protocol - Wikipedia

    en.wikipedia.org/wiki/Montreal_Protocol

    The largest Antarctic ozone hole recorded (September 1985) 2012 retrospective video by NASA on the Montreal Protocol. The Montreal Protocol on Substances That Deplete the Ozone Layer [2] is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion ...

  8. Ozone layer - Wikipedia

    en.wikipedia.org/wiki/Ozone_layer

    The ozone layer visible from space at Earth's horizon as a blue band of afterglow within the bottom of the large bright blue band that is the stratosphere, with a silhouette of a cumulonimbus in the orange afterglow of the troposphere. The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet ...

  9. Ozone depletion - Wikipedia

    en.wikipedia.org/wiki/Ozone_depletion

    Following the ozone depletion in 1997 and 2011, a 90% drop in ozone was measured by weather balloons over the Arctic in March 2020, as they normally recorded 3.5 parts per million of ozone, compared to only around 0.3 parts per million lastly, due to the coldest temperatures ever recorded since 1979, and a strong polar vortex which allowed ...