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Gr 3–6—Wet, slimy seaweed, one of the oldest life forms on Earth, could be one of the keys to saving the planet, according to this slim but enlightening text. The saltwater algae provides food and shelter for countless living things and produces more oxygen than all the planet's land forests put together. Readers are introduced to different types of seaweed forests from all over Earth, each one integral to the world's survival. Almost half of the oxygen in Earth's atmosphere comes fro...Log In or Sign Up to Read More