https://www.earth.com/news/space-travel-has-left-a-metal-mark-on-earths-stratosphere/
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Space travel has left a metallic mark on Earth's stratosphere - Earth.com
10/16/23 at 7:06pm
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Earth.com
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The space age has unintentionally marked its presence on one of the most untouched realms of the Earth – the stratosphere
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