Does global warming affect the ocean's oxygen levels?
Learn about the steady decline in levels of dissolved oxygen in the ocean, a phenomenon linked to global warming.
Encyclopædia Britannica, Inc.
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Encyclopædia Britannica, Inc.It's a common misconception that no sharks ever sleep.Media Editor: Miranda Chabot
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Encyclopædia Britannica, Inc.Learn more about the issue of biodiversity loss with Enrique Salmón, a professor at California State University, East Bay.
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Encyclopædia Britannica, Inc.Every minute, multiple liters of air are cycled through your lungs.
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Encyclopædia Britannica, Inc.Cloud seeding can produce an extra 5 to 15% of precipitation.
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Encyclopædia Britannica, Inc.“America's Top Young Scientist” Gitanjali Rao invented a device to help test drinking water for lead. Why do we need it?
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Encyclopædia Britannica, Inc.What lies beneath? Plastic, probably.
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Contunico © ZDF Studios GmbH, Mainz; Thumbnail © Tt/Dreamstime.comLearn about experiments that use plants, notably reeds, to filter pollutants from groundwater.
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What is the Paris climate agreement and why does 1.5C matter?
• Nov. 6, 2026, 11:39 AM ET (BBC)
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