WebOxygen (O 2) production on Earth started over two billion years ago by the splitting of water molecules by the sun and more significantly, through the photosynthesis of blue-green algae in the oceans.Over millions of years, O 2 began to accumulate in Earth’s atmosphere. Ozone also began to form through photochemical dissociation in which O 2 molecules … WebOzone is Earth's natural sunscreen, shielding life from excessive amounts of ultraviolet radiation. But Earth's ozone layer has been damaged by well-intentioned chemicals—chlorofluorocarbons, used for refrigerants and aerosol spray-cans—that have the unintended consequence of destroying ozone molecules.
Ozone: The Earth
Web22 de nov. de 2024 · The ozone layer, Earth’s sunscreen, absorbs about 98 percent of this devastating UV light. The ozone layer is getting thinner. Chemicals called chlorofluorocarbons (CFCs) are a reason we have a thinning ozone layer. A CFC is a … We identify, invest in, and support a diverse, global community of National … Since 1888, the National Geographic Society has awarded over 15,000 grants … Engage with National Geographic Explorers and transform learning experiences … National Geographic has long told the story of our human journey, and that must … Wills and Trust: By including the National Geographic Society in your will or trust … The National Geographic Museum is an ideal destination for curious people of all … Ideas and Insight From National Geographic. About National Geographic … Your impact begins today. Your generous contribution will immediately go to work … Web7 de out. de 2024 · Most atmospheric ozone is concentrated in a layer in the stratosphere, about 9 to 18 miles (15 to 30 km) above the Earth's surface (see the figure below). Ozone is a molecule that contains three … canned hatch green chile
Ozone - NASA
WebIn the stratosphere, ozone is created primarily by ultraviolet radiation. When high-energy ultraviolet rays strike ordinary oxygen molecules (O 2 ), they split the molecule into two … Web26 de out. de 2024 · Chemically active forms of chlorine and bromine in the atmosphere, derived from human-produced compounds, attach to high-altitude polar clouds each … The standard way to express total ozone levels (the amount of ozone in a given vertical column) in the atmosphere is by using Dobson units. Point measurements are reported as mole fractions in nmol/mol (parts per billion, ppb) or as concentrations in μg/m . The study of ozone concentration in the atmosphere started in the 1920s. fixodent cleaning tablets