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During the Science Museum of Virginia’s Earth Day Festival on Saturday, April 19, Vivi, 10, and her sister Nalani, 7, learned how ocean acidification — caused by increased carbon dioxide levels — harms marine ecosystems.

During the Science Museum of Virginia’s Earth Day Festival on Saturday, April 19, Vivi, 10, and her sister Nalani, 7, learned how ocean acidification — caused by increased carbon dioxide levels — harms marine ecosystems.