September 16

ozone hole over the Antarctic False-color view of total ozone over the Antarctic pole on Aug. 20, 2012. The purple and blue colors are where there is the least ozone, and the yellows and reds are where there is more ozone.
Image Credit: NASA.

Today in Science

Ozone Day

September 16th marks the United Nations’ International Day for the Preservation of the Ozone Layer, or “Ozone Day,” which is observed annually on the anniversary of the 1987 signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. This event is designed to highlight the problems facing the ozone layer, its relationship with climate change, and what individuals and industries can do to protect the ozone layer from further damage. This year marks the 30th anniversary of the Protocol.

The 2018 theme is "Keep Cool and Carry On!" highlighting the Montreal Protocol's new mandate to phase down climate-warming hydrofluorocarbons under the Kigali Amendment and the importance of work in the refrigeration and air-conditioning sectors toward this end.

Develop an understanding of the atmosphere through Air Masses and the role they play in weather and climate. Learn how air takes up space and puts pressure, or pushes, on everything around it in Properties of Air. In Ozone Fill-up, hear how many countries are phasing out the use of ozone-destroying chemicals called CFCs to give the ozone hole a chance to heal itself. While carbon emissions may be dominating the headlines, some think human sources of nitrogen may be just as environmentally costly. Learn more in the podcast, Nitrogen Pollution. You can learn about newer developments in fans in Cooling Nature.

Would you ever think that bacteria, fungi, and possibly viruses could span the globe on clouds of traveling dust? Or that one way to remove ozone from indoor air is through dead skin flakes in dust? The Science Update Ozone-Scrubbing Skin explores how. Speaking of skin, learn how harmful UV rays that travel through the ozone layer cause damaging effects and how to provide protection from them in Sun & Skin, part of the Skin Deep Project

Through the lesson, How We Know What We Know about Our Changing Climate, students get an introduction to the scientific research into climate change and the role of citizen scientists in helping professional scientists generate data to track the problem and devise solutions. Power Up! combines a lesson with an interactive to examine the trade-offs between the type of power plant and the environmental impact of each choice. Learn how we use different energy sources and how they affect not only our environment but also our budget using the interactive, Your Carbon Diet. Students can discuss Urban Greening, including Green Roof Designs, as ways to improve air quality.

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