Participants release a mask from an earth-shaped balloon as they perform a skit against climate change during the Earth Day ceremony in Seoul, South Korea, Thursday, April 22, 2021. (AP Photo/Lee Jin-man)
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Participants release a mask from an earth-shaped balloon as they perform a skit against climate change during the Earth Day ceremony in Seoul, South Korea, Thursday, April 22, 2021. (AP Photo/Lee Jin-man)
