An Adlaw han Kalibotan (Earth's Day) in ginsasaurog kada Abril 22 nga may panuyuan mag-aghat ha kalibutan hin mga kalikopan nga pag-gios para maproteksyon an libong ngan an planeta nga Kalibotan.
Iton ginhulagway ni senado han Amerikano ha Gaylord Nelson hadton 1970.
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