Here is the impact of our buildings on energy consumption, CO2 emissions, and the like:
Share of total energy used by buildings: 39%
Share of electricity sued by buildings: 68%
Share of carbon-dioxide emissions caused by buildings: 40%
Share of raw materials used in buildings: 30%
Share of non-industrial landfill related to buildings: 40%
These figures add up to an opportunity of staggering propotions!
Source: U.S. Green Building Council