This ventilation system is a green feature because it requires no electricity to ventilate hot air from a room.
This motion detecting light switch is a green feature because it only activates the lights when lights are needed. this saves a lot of electricity.
This building is a green building because it is made of a non-scarce wood, which means no pollutants(or very little) were made during the processing of its materials and no rare trees were destroyed for its materials.
This energy efficient heater is a green feature due to the fact that it optimizes electricity use which in turn helps the environment.
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