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Threats to the ozone layer continue, from, for example, chlorine-containing molecules emitted by massive wildfires and aluminum oxide produced when satellites and other space objects burn up upon reentry into the atmosphere.—Andrea Thompson, Scientific American, 22 Apr. 2026 This mass incineration of metal would result in a steep increase in concentrations of potentially dangerous pollutants such as aluminum oxide and lithium in the upper atmosphere, which could lead to ozone depletion and temperature changes.—Tereza Pultarova, Space.com, 13 Mar. 2026 The earliest aluminum oxide sublayers didn’t contain enough aluminum.—Mahesh Nepal, The Conversation, 19 Jan. 2026 Using a Whetstone Whetstones (also known as sharpening stones) are flat blocks of abrasive material made from aluminum oxide, ceramics, steel sheets coated with diamond particles, or natural stone.—Randi Gollin, Martha Stewart, 15 Jan. 2026 See All Example Sentences for aluminum oxide