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tree of knowledge. school learning ecology. environmental education. happy student girl with plant at blackboard. school nature study. teacher woman in glasses at biology lesson. save the world
Keywords:
education
adult
women
caucasian ethnicity
blackboard
smiling
cheerful
one person
portrait
teacher of biology
environmental education
knowledge lesson
knowledge tree
tree of knowledge
biology teacher
save the world
lesson in nature
happy world
lessons in nature
plant study
world save
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