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| 1 | Kodomo Happa Kanteishi activities which seek to raise awareness of primary and secondary school students by researching the amount of CO2 absorbed by trees | こども葉っぱ鑑定士 | |||
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| 1 | Kodomo Happa Kanteishi activities which seek to raise awareness of primary and secondary school students by researching the amount of CO2 absorbed by trees | こども葉っぱ鑑定士 | |||
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