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much lower power bills. during the day we won t turn lights on here to have classes and agentivities during the day. our classrooms are the same way. we don t know we have to turn a light switch on in the classrooms. that is a big savings. we hope. reporter: a wind turbine churns up to 30% of the hospital electricity. mary sweet runs the place. were you skeptical of this idea? initially, yes. i thought it was a gimmick, a way to build back and have people help us. like i mention, it s a road map of a way to follow construction. it s working wonderfully. reporter: all over town, houses are springing up with eco-friendly designs, like this model made of concrete filled with smart utilities feeding off solar cells, a machine that pulse drinking water from humidity in the air and so much more. what s going on up here? up here we have the roof top garden.

Power billsLight switchHospital electricityWind turbineMary sweetAll over townRoad mapPulse drinking waterUtilities feedingRoof top gardenA machine