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wildebeest in Ngorongoro conservation area
Teacher showing lake water to school children, during field teaching class. Outdoor active education helping young student to learn about ecosystem.
A group of environmental conservation volunteers is helping each other collect trash in a public park.
Okutama mountain range, view from Mount Tsukiyomi
Wildlife photographer holding professional camera on tripod, observing wild animals in Corcovado National Park rainforest, Costa Rica

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