What percentage of all energy usage is attributable to buildings?

According to the U.S. Green Building Council (USGBC) and U.S. Department of Energy, buildings account for approximately 40% of total energy consumption in the United States.

This includes electricity, heating, and cooling loads across residential, commercial, and industrial buildings.

Buildings are the largest energy consumers, surpassing transportation and industry sectors.

LEED emphasizes energy efficiency to help reduce this 40% energy demand.

Buildings account for 40% of all energy consumption, making Option C the correct answer.

(Source: Official LEED BD+C Reference Manual)