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Students in Fridley learn about sustainability with their school's new biodigester

North parkKim shelquistJeff cacekOscar kokesLincoln bolithoTim harlowGreen ribbon schoolWaste to energy canadaColumbia heights public school districtPark school for innovationUs department of educationNorth park schoolPrincipal jeffEnergy canadaWaste water panelsவடக்கு பூங்கா