ABSTRACT
In both developed and developing countries, most
of the energy sources used to heat, cool and light
buildings are currently using fossil fuels. The burn-
ing of fossil fuels connected with operating a build-
ing is responsible for approximately 70% to 80%
of the CO
footprint of the building. Carbon neu-
trality with respect to building operation means to
drastically reduce the amount of GHG emitting
energy required to support heating, ventilation,
air-conditioning, lighting, and additionally the
carbon emissions associated with the commercial,
institutional or residential use of the building by
the occupants. These targets may be accomplished
by implementing innovative sustainable design
strategies, generating on-site renewable power and/
or purchasing (20% maximum) renewable energy
and/or certified renewable energy credits. (CND
Project, 2009).
