Below are various actions, small- and large-scale, that three people have applied to their lives:
I. Mandy built her house with daylighting, a cool roof feature, and ENERGY STAR appliances.
II. Kevin installed three LED light bulbs in his home.
III. Orlando decides that he will reduce his heating by two degrees for one week.
Which of the above actions is considered green building?
I only
II only
I and II only
I and III only