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comenius
2o gymnasio kaisarianis
cgw hellas
greece
quiz
alternative energy
environment
endangered animals
challenges
περιβάλλον
αρκτούρος
results
cycling
2ο gymnasio kaisarianis
renewable energy
fossil fuel
alternative
survey
biogas
green
joint activities
closing ceremony
πίνδος
spain
parks
logo
ellada
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