GMAT Critical Reasoning (CR) | Re: In Western economies, more energy is used to operate buildings

In Western economies, more energy is used to operate buildings than to operate transportation. Much of the
decline in energy consumption since the oil crisis of 1973 is due to more efficient use of energy in homes
and offices. New building technologies, which make lighting, heating, and ventilation systems more
efficient, have cut billions of dollars from energy bills in the West. Since energy savings from these
efficiencies save several billion dollars per year today, we can conclude that 50